714.29% is the change from 42 to 342
Calculation steps:
[( 342 - 42 ) ÷ 42] x 100 = 714.29%
Formula
Percentage change = [(342 - 42) / 42] x 100
Subtract the new number by the original number
342 - 42 = 300
300 ÷ 42 = 7.142857142857143
7.142857142857143 x 100 = 714.29%