9870% is the change from 10 to 997
Calculation steps:
[( 997 - 10 ) ÷ 10] x 100 = 9870%
Formula
Percentage change = [(997 - 10) / 10] x 100
Subtract the new number by the original number
997 - 10 = 987
987 ÷ 10 = 98.7
98.7 x 100 = 9870%
Example