-81.5% is the change from 654 to 121
Calculation steps:
[( 121 - 654 ) ÷ 654] x 100 = -81.5%
Formula
Percentage change = [(121 - 654) / 654] x 100
Subtract the new number by the original number
121 - 654 = -533
-533 ÷ 654 = -0.8149847094801224
-0.8149847094801224 x 100 = -81.5%