192.86% is the change from 42 to 123
Calculation steps:
[( 123 - 42 ) ÷ 42] x 100 = 192.86%
Formula
Percentage change = [(123 - 42) / 42] x 100
Subtract the new number by the original number
123 - 42 = 81
81 ÷ 42 = 1.9285714285714286
1.9285714285714286 x 100 = 192.86%