157.14% is the change from 7 to 18
Calculation steps:
[( 18 - 7 ) ÷ 7] x 100 = 157.14%
Formula
Percentage change = [(18 - 7) / 7] x 100
Subtract the new number by the original number
18 - 7 = 11
11 ÷ 7 = 1.5714285714285714
1.5714285714285714 x 100 = 157.14%