18.77% is the change from 831 to 987
Calculation steps:
[( 987 - 831 ) ÷ 831] x 100 = 18.77%
Formula
Percentage change = [(987 - 831) / 831] x 100
Subtract the new number by the original number
987 - 831 = 156
156 ÷ 831 = 0.18772563176895307
0.18772563176895307 x 100 = 18.77%