-98.37% is the change from 919 to 15
Calculation steps:
[( 15 - 919 ) ÷ 919] x 100 = -98.37%
Formula
Percentage change = [(15 - 919) / 919] x 100
Subtract the new number by the original number
15 - 919 = -904
-904 ÷ 919 = -0.9836779107725789
-0.9836779107725789 x 100 = -98.37%