-84.25% is the change from 997 to 157
Calculation steps:
[( 157 - 997 ) ÷ 997] x 100 = -84.25%
Formula
Percentage change = [(157 - 997) / 997] x 100
Subtract the new number by the original number
157 - 997 = -840
-840 ÷ 997 = -0.8425275827482447
-0.8425275827482447 x 100 = -84.25%