-75.9% is the change from 502 to 121
Calculation steps:
[( 121 - 502 ) ÷ 502] x 100 = -75.9%
Formula
Percentage change = [(121 - 502) / 502] x 100
Subtract the new number by the original number
121 - 502 = -381
-381 ÷ 502 = -0.7589641434262948
-0.7589641434262948 x 100 = -75.9%