-69.57% is the change from 917 to 279
Calculation steps:
[( 279 - 917 ) ÷ 917] x 100 = -69.57%
Formula
Percentage change = [(279 - 917) / 917] x 100
Subtract the new number by the original number
279 - 917 = -638
-638 ÷ 917 = -0.6957470010905126
-0.6957470010905126 x 100 = -69.57%