42100% is the change from 1 to 422
Calculation steps:
[( 422 - 1 ) ÷ 1] x 100 = 42100%
Formula
Percentage change = [(422 - 1) / 1] x 100
Subtract the new number by the original number
422 - 1 = 421
421 ÷ 1 = 421
421 x 100 = 42100%
Example