18.71% is the change from 823 to 977
Calculation steps:
[( 977 - 823 ) ÷ 823] x 100 = 18.71%
Formula
Percentage change = [(977 - 823) / 823] x 100
Subtract the new number by the original number
977 - 823 = 154
154 ÷ 823 = 0.18712029161603888
0.18712029161603888 x 100 = 18.71%