1438.89% is the change from 18 to 277
Calculation steps:
[( 277 - 18 ) ÷ 18] x 100 = 1438.89%
Formula
Percentage change = [(277 - 18) / 18] x 100
Subtract the new number by the original number
277 - 18 = 259
259 ÷ 18 = 14.38888888888889
14.38888888888889 x 100 = 1438.89%