Question

60% of a number is 90.

What is 50% of that same number?

A.
30

B.
45

C.
75

D.
150

Answer 1

First you want to find where the 60% came from. Divide 90 by 0.60 for the first number.

Answer 2

Once you have that number, you can either divide by 2 or multiply by 0.50 (0.5) to find 50% of the same number :)

Answer 3

yes i know what 50 50 means hal

Answer 4

did you find what the original number was?

Answer 5

150

Answer 6

Good :) so the answer is half (50%) of that.

Answer 7

75

Answer 8

right! c:

Answer 9

thanks

Answer 10

no problem

Answer 11

60% percent of a number is 90 could be interpreted in algebra as follows:
\[\large \frac{60}{100}x=90\]

Answer 12

60% is the same as 60/100
of means product
is means equal

Answer 13

solve for x

Answer 14

so if solve for x:
\[\large x=\frac{90.100}{60}=\frac{900}{6}=150\]
now you need to find 50% of that

Answer 15

this a systematic way of doing it!