-98.39% is the change from 933 to 15
Calculation steps:
[( 15 - 933 ) ÷ 933] x 100 = -98.39%
Formula
Percentage change = [(15 - 933) / 933] x 100
Subtract the new number by the original number
15 - 933 = -918
-918 ÷ 933 = -0.9839228295819936
-0.9839228295819936 x 100 = -98.39%