39.53% is the change from 602 to 840
Calculation steps:
[( 840 - 602 ) ÷ 602] x 100 = 39.53%
Formula
Percentage change = [(840 - 602) / 602] x 100
Subtract the new number by the original number
840 - 602 = 238
238 ÷ 602 = 0.3953488372093023
0.3953488372093023 x 100 = 39.53%