345.31% is the change from 64 to 285
Calculation steps:
[( 285 - 64 ) ÷ 64] x 100 = 345.31%
Formula
Percentage change = [(285 - 64) / 64] x 100
Subtract the new number by the original number
285 - 64 = 221
221 ÷ 64 = 3.453125
3.453125 x 100 = 345.31%