376.56% is the change from 64 to 305
Calculation steps:
[( 305 - 64 ) ÷ 64] x 100 = 376.56%
Formula
Percentage change = [(305 - 64) / 64] x 100
Subtract the new number by the original number
305 - 64 = 241
241 ÷ 64 = 3.765625
3.765625 x 100 = 376.56%