1300% is the change from 19 to 266
Calculation steps:
[( 266 - 19 ) ÷ 19] x 100 = 1300%
Formula
Percentage change = [(266 - 19) / 19] x 100
Subtract the new number by the original number
266 - 19 = 247
247 ÷ 19 = 13
13 x 100 = 1300%
Example