31.09% is the change from 624 to 818
Calculation steps:
[( 818 - 624 ) ÷ 624] x 100 = 31.09%
Formula
Percentage change = [(818 - 624) / 624] x 100
Subtract the new number by the original number
818 - 624 = 194
194 ÷ 624 = 0.3108974358974359
0.3108974358974359 x 100 = 31.09%