-52.05% is the change from 657 to 315
Calculation steps:
[( 315 - 657 ) ÷ 657] x 100 = -52.05%
Formula
Percentage change = [(315 - 657) / 657] x 100
Subtract the new number by the original number
315 - 657 = -342
-342 ÷ 657 = -0.5205479452054794
-0.5205479452054794 x 100 = -52.05%