-96.31% is the change from 407 to 15
Calculation steps:
[( 15 - 407 ) ÷ 407] x 100 = -96.31%
Formula
Percentage change = [(15 - 407) / 407] x 100
Subtract the new number by the original number
15 - 407 = -392
-392 ÷ 407 = -0.9631449631449631
-0.9631449631449631 x 100 = -96.31%