-37.12% is the change from 660 to 415
Calculation steps:
[( 415 - 660 ) ÷ 660] x 100 = -37.12%
Formula
Percentage change = [(415 - 660) / 660] x 100
Subtract the new number by the original number
415 - 660 = -245
-245 ÷ 660 = -0.3712121212121212
-0.3712121212121212 x 100 = -37.12%