384.38% is the change from 64 to 310
Calculation steps:
[( 310 - 64 ) ÷ 64] x 100 = 384.38%
Formula
Percentage change = [(310 - 64) / 64] x 100
Subtract the new number by the original number
310 - 64 = 246
246 ÷ 64 = 3.84375
3.84375 x 100 = 384.38%
Example