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## Find the percent change from the first value to the second. 40;72 (show how you got your answer for a brainliest)

Question

Find the percent change from the first value to the second.

40;72 (show how you got your answer for a brainliest)

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Mathematics
3 years
2021-07-19T16:34:58+00:00
2021-07-19T16:34:58+00:00 1 Answers
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## Answers ( )

Answer:80% increase

Step-by-step explanation:There are two ways to do this

The first way is to set up a percent proportion

=

To find x, we can do:

x =

x =

x = 180

72 is 180% of 40

There is an 80% increase.

The second way to do it (the way I find easier) is to use benchmark fractions:

We look at 40 and 72 and realize that (40 * 2) – 8 = 72

So 200% of 40 – 8 = 72

Then, we find out what percent of 40 is 8.

10% of 40 is 4

so that means 20% of 40 is 8 (10% * 2 = 4 * 2)

Then we do:

80 – 8 = 72

200% – 20% = 180%

72 = 180% of 40

Which is an 80% increase

Let me know if you have any questions