1138.24% is the change from 34 to 421
Calculation steps:
[( 421 - 34 ) ÷ 34] x 100 = 1138.24%
Formula
Percentage change = [(421 - 34) / 34] x 100
Subtract the new number by the original number
421 - 34 = 387
387 ÷ 34 = 11.382352941176471
11.382352941176471 x 100 = 1138.24%