18.05% is the change from 831 to 981
Calculation steps:
[( 981 - 831 ) ÷ 831] x 100 = 18.05%
Formula
Percentage change = [(981 - 831) / 831] x 100
Subtract the new number by the original number
981 - 831 = 150
150 ÷ 831 = 0.18050541516245489
0.18050541516245489 x 100 = 18.05%