-63.5% is the change from 863 to 315
Calculation steps:
[( 315 - 863 ) ÷ 863] x 100 = -63.5%
Formula
Percentage change = [(315 - 863) / 863] x 100
Subtract the new number by the original number
315 - 863 = -548
-548 ÷ 863 = -0.6349942062572422
-0.6349942062572422 x 100 = -63.5%