-96.99% is the change from 997 to 30
Calculation steps:
[( 30 - 997 ) ÷ 997] x 100 = -96.99%
Formula
Percentage change = [(30 - 997) / 997] x 100
Subtract the new number by the original number
30 - 997 = -967
-967 ÷ 997 = -0.9699097291875627
-0.9699097291875627 x 100 = -96.99%