Question

What is this percent of change 40;72

Answer 1

The percentage of change: This is how you set it up 

% change = (New old value) =
                        (Old value) =  x 100 % 

40 is the old value and 72 is is the new value 

The new value is greater than the old value.

(72 - 40) /40)x 100 = 80 or 80%

the percent change from 40 to 72 represents a positive change (increases) of 80.

Answer 2

First find the change: new minus the old
72 - 42 = 32
Now, find the percentage... multiply by 100
32 divided by old 42 times 100
(32/42)/100
=80%