286.24% is the change from 109 to 421
Calculation steps:
[( 421 - 109 ) ÷ 109] x 100 = 286.24%
Formula
Percentage change = [(421 - 109) / 109] x 100
Subtract the new number by the original number
421 - 109 = 312
312 ÷ 109 = 2.8623853211009176
2.8623853211009176 x 100 = 286.24%