-65.29% is the change from 121 to 42
Calculation steps:
[( 42 - 121 ) ÷ 121] x 100 = -65.29%
Formula
Percentage change = [(42 - 121) / 121] x 100
Subtract the new number by the original number
42 - 121 = -79
-79 ÷ 121 = -0.6528925619834711
-0.6528925619834711 x 100 = -65.29%