-99.24% is the change from 921 to 7
Calculation steps:
[( 7 - 921 ) ÷ 921] x 100 = -99.24%
Formula
Percentage change = [(7 - 921) / 921] x 100
Subtract the new number by the original number
7 - 921 = -914
-914 ÷ 921 = -0.992399565689468
-0.992399565689468 x 100 = -99.24%