-98.7% is the change from 921 to 12
Calculation steps:
[( 12 - 921 ) ÷ 921] x 100 = -98.7%
Formula
Percentage change = [(12 - 921) / 921] x 100
Subtract the new number by the original number
12 - 921 = -909
-909 ÷ 921 = -0.9869706840390879
-0.9869706840390879 x 100 = -98.7%