-27.69% is the change from 661 to 478
Calculation steps:
[( 478 - 661 ) ÷ 661] x 100 = -27.69%
Formula
Percentage change = [(478 - 661) / 661] x 100
Subtract the new number by the original number
478 - 661 = -183
-183 ÷ 661 = -0.27685325264750377
-0.27685325264750377 x 100 = -27.69%