-35.32% is the change from 487 to 315
Calculation steps:
[( 315 - 487 ) ÷ 487] x 100 = -35.32%
Formula
Percentage change = [(315 - 487) / 487] x 100
Subtract the new number by the original number
315 - 487 = -172
-172 ÷ 487 = -0.3531827515400411
-0.3531827515400411 x 100 = -35.32%