31.25% is the change from 624 to 819
Calculation steps:
[( 819 - 624 ) ÷ 624] x 100 = 31.25%
Formula
Percentage change = [(819 - 624) / 624] x 100
Subtract the new number by the original number
819 - 624 = 195
195 ÷ 624 = 0.3125
0.3125 x 100 = 31.25%