907.14% is the change from 42 to 423
Calculation steps:
[( 423 - 42 ) ÷ 42] x 100 = 907.14%
Formula
Percentage change = [(423 - 42) / 42] x 100
Subtract the new number by the original number
423 - 42 = 381
381 ÷ 42 = 9.071428571428571
9.071428571428571 x 100 = 907.14%