2042.86% is the change from 42 to 900
Calculation steps:
[( 900 - 42 ) ÷ 42] x 100 = 2042.86%
Formula
Percentage change = [(900 - 42) / 42] x 100
Subtract the new number by the original number
900 - 42 = 858
858 ÷ 42 = 20.428571428571427
20.428571428571427 x 100 = 2042.86%