-97.44% is the change from 587 to 15
Calculation steps:
[( 15 - 587 ) ÷ 587] x 100 = -97.44%
Formula
Percentage change = [(15 - 587) / 587] x 100
Subtract the new number by the original number
15 - 587 = -572
-572 ÷ 587 = -0.9744463373083475
-0.9744463373083475 x 100 = -97.44%