259.38% is the change from 64 to 230
Calculation steps:
[( 230 - 64 ) ÷ 64] x 100 = 259.38%
Formula
Percentage change = [(230 - 64) / 64] x 100
Subtract the new number by the original number
230 - 64 = 166
166 ÷ 64 = 2.59375
2.59375 x 100 = 259.38%
Example