20.61% is the change from 815 to 983
Calculation steps:
[( 983 - 815 ) ÷ 815] x 100 = 20.61%
Formula
Percentage change = [(983 - 815) / 815] x 100
Subtract the new number by the original number
983 - 815 = 168
168 ÷ 815 = 0.20613496932515338
0.20613496932515338 x 100 = 20.61%