Question

HELP ME PLEASE:

which fraction would you use to find 25% of 16 mentally?

A. 1/5
B. 1/4
C. 1/3
D. 1/2

Answer 1

you would use 1/4 right?

Answer 2

1/4

Answer 3

how did you get that?

Answer 4

think about...what is 25%...it is 25 out of 100 ...or 25/100

25 times 4 is 100....25/100 = 1/4

Answer 5

ohhh.

Answer 6

just like if you wanted to see what was 50%...50 percent is 50 out of 100...or 50/100

50 goes into 100 2 times...so it is 1/2 of 100...and 1/2 is the fraction

Answer 7

13. which is the best estimate for 48% of 31?

Answer 8

sorry I'm not good at these.

Answer 9

what is 48 percent...very close to? very close to 50% right?...so what is 50 % of 31?

well it's 1/2 times 31 right? whats 1/2 of 31?

Answer 10

15

Answer 11

right...thats going to be your closest estimate

Answer 12

do you know how to do percent of change problems?

Answer 13

...give me an example

Answer 14

hang on

Answer 15

from 14 in. to 35 in. Find the percent of change.

Answer 16

ohh okay...well...

14...can be seen as our starting point.... at 100%
28 would be double that point correct? also known as adding 100% of our starting point
7 is half of 14 right? it is 50% of 14 right?

we have 28...and we need 7 to reach 35.....so at 28...we have 200% (starting point is 100%...doubled = 200%.....and we need 7...which we just figured out was 50% of the original point...(which was 100%...so 50% of 100%...is 50%)

so add that 50% to the 200% we already have...and we have from 14 to 35 is a 250% change

Answer 17

Im so confused

Answer 18

:(