177.78% is the change from 18 to 50
Calculation steps:
[( 50 - 18 ) ÷ 18] x 100 = 177.78%
Formula
Percentage change = [(50 - 18) / 18] x 100
Subtract the new number by the original number
50 - 18 = 32
32 ÷ 18 = 1.7777777777777777
1.7777777777777777 x 100 = 177.78%