-91.34% is the change from 993 to 86
Calculation steps:
[( 86 - 993 ) ÷ 993] x 100 = -91.34%
Formula
Percentage change = [(86 - 993) / 993] x 100
Subtract the new number by the original number
86 - 993 = -907
-907 ÷ 993 = -0.9133937562940584
-0.9133937562940584 x 100 = -91.34%