-41.36% is the change from 660 to 387
Calculation steps:
[( 387 - 660 ) ÷ 660] x 100 = -41.36%
Formula
Percentage change = [(387 - 660) / 660] x 100
Subtract the new number by the original number
387 - 660 = -273
-273 ÷ 660 = -0.41363636363636364
-0.41363636363636364 x 100 = -41.36%