31.94% is the change from 620 to 818
Calculation steps:
[( 818 - 620 ) ÷ 620] x 100 = 31.94%
Formula
Percentage change = [(818 - 620) / 620] x 100
Subtract the new number by the original number
818 - 620 = 198
198 ÷ 620 = 0.3193548387096774
0.3193548387096774 x 100 = 31.94%