-30.76% is the change from 660 to 457
Calculation steps:
[( 457 - 660 ) ÷ 660] x 100 = -30.76%
Formula
Percentage change = [(457 - 660) / 660] x 100
Subtract the new number by the original number
457 - 660 = -203
-203 ÷ 660 = -0.30757575757575756
-0.30757575757575756 x 100 = -30.76%