-71.88% is the change from 921 to 259
Calculation steps:
[( 259 - 921 ) ÷ 921] x 100 = -71.88%
Formula
Percentage change = [(259 - 921) / 921] x 100
Subtract the new number by the original number
259 - 921 = -662
-662 ÷ 921 = -0.7187839305103149
-0.7187839305103149 x 100 = -71.88%