-71.12% is the change from 921 to 266
Calculation steps:
[( 266 - 921 ) ÷ 921] x 100 = -71.12%
Formula
Percentage change = [(266 - 921) / 921] x 100
Subtract the new number by the original number
266 - 921 = -655
-655 ÷ 921 = -0.7111834961997828
-0.7111834961997828 x 100 = -71.12%