684.38% is the change from 64 to 502
Calculation steps:
[( 502 - 64 ) ÷ 64] x 100 = 684.38%
Formula
Percentage change = [(502 - 64) / 64] x 100
Subtract the new number by the original number
502 - 64 = 438
438 ÷ 64 = 6.84375
6.84375 x 100 = 684.38%
Example