-4.47% is the change from 291 to 278
Calculation steps:
[( 278 - 291 ) ÷ 291] x 100 = -4.47%
Formula
Percentage change = [(278 - 291) / 291] x 100
Subtract the new number by the original number
278 - 291 = -13
-13 ÷ 291 = -0.044673539518900345
-0.044673539518900345 x 100 = -4.47%