285.94% is the change from 64 to 247
Calculation steps:
[( 247 - 64 ) ÷ 64] x 100 = 285.94%
Formula
Percentage change = [(247 - 64) / 64] x 100
Subtract the new number by the original number
247 - 64 = 183
183 ÷ 64 = 2.859375
2.859375 x 100 = 285.94%