115.2% is the change from 421 to 906
Calculation steps:
[( 906 - 421 ) ÷ 421] x 100 = 115.2%
Formula
Percentage change = [(906 - 421) / 421] x 100
Subtract the new number by the original number
906 - 421 = 485
485 ÷ 421 = 1.152019002375297
1.152019002375297 x 100 = 115.2%