-76% is the change from 500 to 120
Calculation steps:
[( 120 - 500 ) ÷ 500] x 100 = -76%
Formula
Percentage change = [(120 - 500) / 500] x 100
Subtract the new number by the original number
120 - 500 = -380
-380 ÷ 500 = -0.76
-0.76 x 100 = -76%
Example