6.33% is the change from 790 to 840
Calculation steps:
[( 840 - 790 ) ÷ 790] x 100 = 6.33%
Formula
Percentage change = [(840 - 790) / 790] x 100
Subtract the new number by the original number
840 - 790 = 50
50 ÷ 790 = 0.06329113924050633
0.06329113924050633 x 100 = 6.33%