-31.65% is the change from 79 to 54
Calculation steps:
[( 54 - 79 ) ÷ 79] x 100 = -31.65%
Formula
Percentage change = [(54 - 79) / 79] x 100
Subtract the new number by the original number
54 - 79 = -25
-25 ÷ 79 = -0.31645569620253167
-0.31645569620253167 x 100 = -31.65%