310.94% is the change from 64 to 263
Calculation steps:
[( 263 - 64 ) ÷ 64] x 100 = 310.94%
Formula
Percentage change = [(263 - 64) / 64] x 100
Subtract the new number by the original number
263 - 64 = 199
199 ÷ 64 = 3.109375
3.109375 x 100 = 310.94%