-66.94% is the change from 121 to 40
Calculation steps:
[( 40 - 121 ) ÷ 121] x 100 = -66.94%
Formula
Percentage change = [(40 - 121) / 121] x 100
Subtract the new number by the original number
40 - 121 = -81
-81 ÷ 121 = -0.6694214876033058
-0.6694214876033058 x 100 = -66.94%