-62.81% is the change from 847 to 315
Calculation steps:
[( 315 - 847 ) ÷ 847] x 100 = -62.81%
Formula
Percentage change = [(315 - 847) / 847] x 100
Subtract the new number by the original number
315 - 847 = -532
-532 ÷ 847 = -0.628099173553719
-0.628099173553719 x 100 = -62.81%