19.58% is the change from 817 to 977
Calculation steps:
[( 977 - 817 ) ÷ 817] x 100 = 19.58%
Formula
Percentage change = [(977 - 817) / 817] x 100
Subtract the new number by the original number
977 - 817 = 160
160 ÷ 817 = 0.19583843329253367
0.19583843329253367 x 100 = 19.58%