-46.02% is the change from 515 to 278
Calculation steps:
[( 278 - 515 ) ÷ 515] x 100 = -46.02%
Formula
Percentage change = [(278 - 515) / 515] x 100
Subtract the new number by the original number
278 - 515 = -237
-237 ÷ 515 = -0.4601941747572815
-0.4601941747572815 x 100 = -46.02%