496.49% is the change from 57 to 340
Calculation steps:
[( 340 - 57 ) ÷ 57] x 100 = 496.49%
Formula
Percentage change = [(340 - 57) / 57] x 100
Subtract the new number by the original number
340 - 57 = 283
283 ÷ 57 = 4.964912280701754
4.964912280701754 x 100 = 496.49%