-68.28% is the change from 993 to 315
Calculation steps:
[( 315 - 993 ) ÷ 993] x 100 = -68.28%
Formula
Percentage change = [(315 - 993) / 993] x 100
Subtract the new number by the original number
315 - 993 = -678
-678 ÷ 993 = -0.6827794561933535
-0.6827794561933535 x 100 = -68.28%