21.07% is the change from 807 to 977
Calculation steps:
[( 977 - 807 ) ÷ 807] x 100 = 21.07%
Formula
Percentage change = [(977 - 807) / 807] x 100
Subtract the new number by the original number
977 - 807 = 170
170 ÷ 807 = 0.21065675340768278
0.21065675340768278 x 100 = 21.07%