-59.2% is the change from 125 to 51
Calculation steps:
[( 51 - 125 ) ÷ 125] x 100 = -59.2%
Formula
Percentage change = [(51 - 125) / 125] x 100
Subtract the new number by the original number
51 - 125 = -74
-74 ÷ 125 = -0.592
-0.592 x 100 = -59.2%
Example