-69.31% is the change from 909 to 279
Calculation steps:
[( 279 - 909 ) ÷ 909] x 100 = -69.31%
Formula
Percentage change = [(279 - 909) / 909] x 100
Subtract the new number by the original number
279 - 909 = -630
-630 ÷ 909 = -0.693069306930693
-0.693069306930693 x 100 = -69.31%