-98.49% is the change from 996 to 15
Calculation steps:
[( 15 - 996 ) ÷ 996] x 100 = -98.49%
Formula
Percentage change = [(15 - 996) / 996] x 100
Subtract the new number by the original number
15 - 996 = -981
-981 ÷ 996 = -0.9849397590361446
-0.9849397590361446 x 100 = -98.49%