16.31% is the change from 840 to 977
Calculation steps:
[( 977 - 840 ) ÷ 840] x 100 = 16.31%
Formula
Percentage change = [(977 - 840) / 840] x 100
Subtract the new number by the original number
977 - 840 = 137
137 ÷ 840 = 0.1630952380952381
0.1630952380952381 x 100 = 16.31%