-98.26% is the change from 863 to 15
Calculation steps:
[( 15 - 863 ) ÷ 863] x 100 = -98.26%
Formula
Percentage change = [(15 - 863) / 863] x 100
Subtract the new number by the original number
15 - 863 = -848
-848 ÷ 863 = -0.9826187717265353
-0.9826187717265353 x 100 = -98.26%