670.37% is the change from 81 to 624
Calculation steps:
[( 624 - 81 ) ÷ 81] x 100 = 670.37%
Formula
Percentage change = [(624 - 81) / 81] x 100
Subtract the new number by the original number
624 - 81 = 543
543 ÷ 81 = 6.703703703703703
6.703703703703703 x 100 = 670.37%