-50.8% is the change from 565 to 278
Calculation steps:
[( 278 - 565 ) ÷ 565] x 100 = -50.8%
Formula
Percentage change = [(278 - 565) / 565] x 100
Subtract the new number by the original number
278 - 565 = -287
-287 ÷ 565 = -0.5079646017699115
-0.5079646017699115 x 100 = -50.8%