686.15% is the change from 65 to 511
Calculation steps:
[( 511 - 65 ) ÷ 65] x 100 = 686.15%
Formula
Percentage change = [(511 - 65) / 65] x 100
Subtract the new number by the original number
511 - 65 = 446
446 ÷ 65 = 6.861538461538461
6.861538461538461 x 100 = 686.15%