-76% is the change from 921 to 221
Calculation steps:
[( 221 - 921 ) ÷ 921] x 100 = -76%
Formula
Percentage change = [(221 - 921) / 921] x 100
Subtract the new number by the original number
221 - 921 = -700
-700 ÷ 921 = -0.760043431053203
-0.760043431053203 x 100 = -76%