-76.78% is the change from 900 to 209
Calculation steps:
[( 209 - 900 ) ÷ 900] x 100 = -76.78%
Formula
Percentage change = [(209 - 900) / 900] x 100
Subtract the new number by the original number
209 - 900 = -691
-691 ÷ 900 = -0.7677777777777778
-0.7677777777777778 x 100 = -76.78%