2100% is the change from 42 to 924
Calculation steps:
[( 924 - 42 ) ÷ 42] x 100 = 2100%
Formula
Percentage change = [(924 - 42) / 42] x 100
Subtract the new number by the original number
924 - 42 = 882
882 ÷ 42 = 21
21 x 100 = 2100%
Example