707.14% is the change from 42 to 339
Calculation steps:
[( 339 - 42 ) ÷ 42] x 100 = 707.14%
Formula
Percentage change = [(339 - 42) / 42] x 100
Subtract the new number by the original number
339 - 42 = 297
297 ÷ 42 = 7.071428571428571
7.071428571428571 x 100 = 707.14%