39.3% is the change from 603 to 840
Calculation steps:
[( 840 - 603 ) ÷ 603] x 100 = 39.3%
Formula
Percentage change = [(840 - 603) / 603] x 100
Subtract the new number by the original number
840 - 603 = 237
237 ÷ 603 = 0.39303482587064675
0.39303482587064675 x 100 = 39.3%