-58.45% is the change from 669 to 278
Calculation steps:
[( 278 - 669 ) ÷ 669] x 100 = -58.45%
Formula
Percentage change = [(278 - 669) / 669] x 100
Subtract the new number by the original number
278 - 669 = -391
-391 ÷ 669 = -0.5844544095665172
-0.5844544095665172 x 100 = -58.45%