Question

What is the percent of increase from 50 to 90?

A.
40%

B.
44%

C.
56%

D.
80%

Answer 1

o thanks i was going to tag you in lol

Answer 2

@triciaal

Answer 3

ok

Answer 4

All you have to do is round

Answer 5

ok the next one is What is the percent decrease from 120 to 84? @TheEdwardsFamily

Answer 6

you round

Answer 7

what do you get?

Answer 8

ok how do you do that

Answer 9

http://www.webmath.com/k8round.html

Answer 10

ok what do i round it to

Answer 11

10s

Answer 12

?

Answer 13

round 120 and 84

Answer 14

yes

Answer 15

yea

Answer 16

in order to find the percent of change between start and end values:

you subtract them to find the difference and divide it by the start value


end - start
---------- = % change
start

Answer 17

right

Answer 18

what is the difference between 120 and 84?

Answer 19

or you can o it like that @amistre64

Answer 20

84 is small than 120 or the 84 is in the tens and the 120 is hundreds

Answer 21

what is 120 minus 84?

Answer 22

36

Answer 23

then 36 is the difference between start and end

divide by start we get: 36/120

Answer 24

0.3

Answer 25

or 3

Answer 26

?

Answer 27

good, then the percentage change is .... 30%

Answer 28

ok

Answer 29

to change a decimal to a percentage we multiply by 100

Answer 30

ok

Answer 31

so in the first one:

What is the percent of increase from 50 to 90?

the difference between 50 and 90 is 40 .... divide 40 by the start value: 50

the percent of increase is 4/5, or .8 * 100 = 80%

Answer 32

ok now i know how to that i have 3 more

Answer 33

he water in a reservoir decreased by 47% during a drought. Before the drought, the reservoir held 44,580 acre ft (AF) of water.

How much water did the reservoir hold, after the drought?

Answer 34

knowing how is half the battle :)

Answer 35

ok

Answer 36

it is geting good at it right

Answer 37

using the information, and knowing the formula we get

end - start
--------- = .47
start

solving for end we get:

end - start = .47(start)

end = .47(start) + start


but start = 44580, so what is end?

Answer 38

one little thing i overlooked was we decreased so we are dealing with a negative percent change to start with:

-.47 not .47

end = -.47(start) + start

Answer 39

ok

Answer 40

so how do we get the end do we subtract it ?

Answer 41

do we round it

Answer 42

i assumed you were familiar with some of the basic algebra methods.

i solved the formula for end, since that is the amount we want to know.

end = -4.7(start) + start

or simply: end = start(1-.47)

Answer 43

unless the question specifically asks you to round, then i wouldnt round it

Answer 44

those kinds of questions you do round

Answer 45

I would think

Answer 46

when i do mathlab questions, i tend to get skunked because some questions say round to 3 decies, others say 1 decie, others say 4 .... i always overlook the specifics :)

Answer 47

I have never heard anyone say "I get Skunked". That is new to me.

Answer 48

so what do i do next

Answer 49

show me what youve done so far ... if youve done it correctly you should have the answer.

Answer 50

Ask @amistre64

Answer 51

@bohotness

Answer 52

well do i subtract it ? im on end=start(-.47)

Answer 53

what are your questions I can answer quickly @shadybubba

Answer 54

The water in a reservoir decreased by 47% during a drought. Before the drought, the reservoir held 44,580 acre ft (AF) of water.

How much water did the reservoir hold, after the drought?

Answer 55

end = start(1-.47)

we know we started with 44580 sooo

end = 44580(1-.47)

Answer 56

so the answer is (1-.47)

Answer 57

@shadybubba 23627.4

Answer 58

is the answer

Answer 59

:)

Answer 60

ok the next one is The cost of a camera decreased from $150 to $65.

What is the percent of decrease in the price?
Round to the nearest percent.

A.
43%

B.
57%

C.
85%

D.
131%

Answer 61

@tom982

Answer 62

C 85% because 150 decreased by 65 is 85

Answer 63

whats the difference between 150 and 65?

Answer 64

I just said that @amistre64

Answer 65

150-65

Answer 66

85 is the decrease in value, not the percent of change

85 out of 150 is the percent of change

85/150 is equal to?

Answer 67

yes

Answer 68

150-65=85 which would be C

Answer 69

85%?

Answer 70

right

Answer 71

yes

Answer 72

85 is the decrease in value, not the percent of change

85 out of 150 is the percent of change

85/150 is equal to?

Answer 73

ok the last one is Dan had $160 in his bank account. After depositing his paycheck, he had $224 in his bank account.

What was the percent of increase in Dan’s bank account after the deposit?

Answer 74

Dan had $160 in his bank account. After depositing his paycheck, he had $224 in his bank account.What was the percent of increase in Dan’s bank account after the deposit?

Answer 75

@TheEdwardsFamily

Answer 76

@amistre64

Answer 77

help me plz

Answer 78

what do you think

Answer 79

160*(1+x/100)=224

Answer 80

medal?