20.99% is the change from 810 to 980
Calculation steps:
[( 980 - 810 ) ÷ 810] x 100 = 20.99%
Formula
Percentage change = [(980 - 810) / 810] x 100
Subtract the new number by the original number
980 - 810 = 170
170 ÷ 810 = 0.20987654320987653
0.20987654320987653 x 100 = 20.99%