2073.33% is the change from 15 to 326
Calculation steps:
[( 326 - 15 ) ÷ 15] x 100 = 2073.33%
Formula
Percentage change = [(326 - 15) / 15] x 100
Subtract the new number by the original number
326 - 15 = 311
311 ÷ 15 = 20.733333333333334
20.733333333333334 x 100 = 2073.33%