3973.33% is the change from 15 to 611
Calculation steps:
[( 611 - 15 ) ÷ 15] x 100 = 3973.33%
Formula
Percentage change = [(611 - 15) / 15] x 100
Subtract the new number by the original number
611 - 15 = 596
596 ÷ 15 = 39.733333333333334
39.733333333333334 x 100 = 3973.33%