-75.69% is the change from 909 to 221
Calculation steps:
[( 221 - 909 ) ÷ 909] x 100 = -75.69%
Formula
Percentage change = [(221 - 909) / 909] x 100
Subtract the new number by the original number
221 - 909 = -688
-688 ÷ 909 = -0.7568756875687569
-0.7568756875687569 x 100 = -75.69%