868.75% is the change from 64 to 620
Calculation steps:
[( 620 - 64 ) ÷ 64] x 100 = 868.75%
Formula
Percentage change = [(620 - 64) / 64] x 100
Subtract the new number by the original number
620 - 64 = 556
556 ÷ 64 = 8.6875
8.6875 x 100 = 868.75%
Example