17.69% is the change from 831 to 978
Calculation steps:
[( 978 - 831 ) ÷ 831] x 100 = 17.69%
Formula
Percentage change = [(978 - 831) / 831] x 100
Subtract the new number by the original number
978 - 831 = 147
147 ÷ 831 = 0.17689530685920576
0.17689530685920576 x 100 = 17.69%