-90.97% is the change from 997 to 90
Calculation steps:
[( 90 - 997 ) ÷ 997] x 100 = -90.97%
Formula
Percentage change = [(90 - 997) / 997] x 100
Subtract the new number by the original number
90 - 997 = -907
-907 ÷ 997 = -0.9097291875626881
-0.9097291875626881 x 100 = -90.97%