-5.15% is the change from 291 to 276
Calculation steps:
[( 276 - 291 ) ÷ 291] x 100 = -5.15%
Formula
Percentage change = [(276 - 291) / 291] x 100
Subtract the new number by the original number
276 - 291 = -15
-15 ÷ 291 = -0.05154639175257732
-0.05154639175257732 x 100 = -5.15%