-52.42% is the change from 662 to 315
Calculation steps:
[( 315 - 662 ) ÷ 662] x 100 = -52.42%
Formula
Percentage change = [(315 - 662) / 662] x 100
Subtract the new number by the original number
315 - 662 = -347
-347 ÷ 662 = -0.5241691842900302
-0.5241691842900302 x 100 = -52.42%