-54.22% is the change from 688 to 315
Calculation steps:
[( 315 - 688 ) ÷ 688] x 100 = -54.22%
Formula
Percentage change = [(315 - 688) / 688] x 100
Subtract the new number by the original number
315 - 688 = -373
-373 ÷ 688 = -0.5421511627906976
-0.5421511627906976 x 100 = -54.22%