638.1% is the change from 42 to 310
Calculation steps:
[( 310 - 42 ) ÷ 42] x 100 = 638.1%
Formula
Percentage change = [(310 - 42) / 42] x 100
Subtract the new number by the original number
310 - 42 = 268
268 ÷ 42 = 6.380952380952381
6.380952380952381 x 100 = 638.1%