850% is the change from 64 to 608
Calculation steps:
[( 608 - 64 ) ÷ 64] x 100 = 850%
Formula
Percentage change = [(608 - 64) / 64] x 100
Subtract the new number by the original number
608 - 64 = 544
544 ÷ 64 = 8.5
8.5 x 100 = 850%
Example