40.7% is the change from 597 to 840
Calculation steps:
[( 840 - 597 ) ÷ 597] x 100 = 40.7%
Formula
Percentage change = [(840 - 597) / 597] x 100
Subtract the new number by the original number
840 - 597 = 243
243 ÷ 597 = 0.40703517587939697
0.40703517587939697 x 100 = 40.7%