-98.36% is the change from 913 to 15
Calculation steps:
[( 15 - 913 ) ÷ 913] x 100 = -98.36%
Formula
Percentage change = [(15 - 913) / 913] x 100
Subtract the new number by the original number
15 - 913 = -898
-898 ÷ 913 = -0.9835706462212487
-0.9835706462212487 x 100 = -98.36%