-77.91% is the change from 661 to 146
Calculation steps:
[( 146 - 661 ) ÷ 661] x 100 = -77.91%
Formula
Percentage change = [(146 - 661) / 661] x 100
Subtract the new number by the original number
146 - 661 = -515
-515 ÷ 661 = -0.7791225416036308
-0.7791225416036308 x 100 = -77.91%