1240% is the change from 20 to 268
Calculation steps:
[( 268 - 20 ) ÷ 20] x 100 = 1240%
Formula
Percentage change = [(268 - 20) / 20] x 100
Subtract the new number by the original number
268 - 20 = 248
248 ÷ 20 = 12.4
12.4 x 100 = 1240%
Example