642.86% is the change from 84 to 624
Calculation steps:
[( 624 - 84 ) ÷ 84] x 100 = 642.86%
Formula
Percentage change = [(624 - 84) / 84] x 100
Subtract the new number by the original number
624 - 84 = 540
540 ÷ 84 = 6.428571428571429
6.428571428571429 x 100 = 642.86%