-98.34% is the change from 906 to 15
Calculation steps:
[( 15 - 906 ) ÷ 906] x 100 = -98.34%
Formula
Percentage change = [(15 - 906) / 906] x 100
Subtract the new number by the original number
15 - 906 = -891
-891 ÷ 906 = -0.9834437086092715
-0.9834437086092715 x 100 = -98.34%