511.76% is the change from 85 to 520
Calculation steps:
[( 520 - 85 ) ÷ 85] x 100 = 511.76%
Formula
Percentage change = [(520 - 85) / 85] x 100
Subtract the new number by the original number
520 - 85 = 435
435 ÷ 85 = 5.117647058823529
5.117647058823529 x 100 = 511.76%