-98.59% is the change from 921 to 13
Calculation steps:
[( 13 - 921 ) ÷ 921] x 100 = -98.59%
Formula
Percentage change = [(13 - 921) / 921] x 100
Subtract the new number by the original number
13 - 921 = -908
-908 ÷ 921 = -0.9858849077090119
-0.9858849077090119 x 100 = -98.59%