-75.21% is the change from 121 to 30
Calculation steps:
[( 30 - 121 ) ÷ 121] x 100 = -75.21%
Formula
Percentage change = [(30 - 121) / 121] x 100
Subtract the new number by the original number
30 - 121 = -91
-91 ÷ 121 = -0.7520661157024794
-0.7520661157024794 x 100 = -75.21%