-27.73% is the change from 660 to 477
Calculation steps:
[( 477 - 660 ) ÷ 660] x 100 = -27.73%
Formula
Percentage change = [(477 - 660) / 660] x 100
Subtract the new number by the original number
477 - 660 = -183
-183 ÷ 660 = -0.2772727272727273
-0.2772727272727273 x 100 = -27.73%