-26.21% is the change from 660 to 487
Calculation steps:
[( 487 - 660 ) ÷ 660] x 100 = -26.21%
Formula
Percentage change = [(487 - 660) / 660] x 100
Subtract the new number by the original number
487 - 660 = -173
-173 ÷ 660 = -0.26212121212121214
-0.26212121212121214 x 100 = -26.21%