-25% is the change from 56 to 42
Calculation steps:
[( 42 - 56 ) ÷ 56] x 100 = -25%
Formula
Percentage change = [(42 - 56) / 56] x 100
Subtract the new number by the original number
42 - 56 = -14
-14 ÷ 56 = -0.25
-0.25 x 100 = -25%
Example