4373.33% is the change from 15 to 671
Calculation steps:
[( 671 - 15 ) ÷ 15] x 100 = 4373.33%
Formula
Percentage change = [(671 - 15) / 15] x 100
Subtract the new number by the original number
671 - 15 = 656
656 ÷ 15 = 43.733333333333334
43.733333333333334 x 100 = 4373.33%