-77.51% is the change from 538 to 121
Calculation steps:
[( 121 - 538 ) ÷ 538] x 100 = -77.51%
Formula
Percentage change = [(121 - 538) / 538] x 100
Subtract the new number by the original number
121 - 538 = -417
-417 ÷ 538 = -0.775092936802974
-0.775092936802974 x 100 = -77.51%