27.85% is the change from 657 to 840
Calculation steps:
[( 840 - 657 ) ÷ 657] x 100 = 27.85%
Formula
Percentage change = [(840 - 657) / 657] x 100
Subtract the new number by the original number
840 - 657 = 183
183 ÷ 657 = 0.2785388127853881
0.2785388127853881 x 100 = 27.85%