-98.39% is the change from 934 to 15
Calculation steps:
[( 15 - 934 ) ÷ 934] x 100 = -98.39%
Formula
Percentage change = [(15 - 934) / 934] x 100
Subtract the new number by the original number
15 - 934 = -919
-919 ÷ 934 = -0.9839400428265525
-0.9839400428265525 x 100 = -98.39%