-91.3% is the change from 276 to 24
Calculation steps:
[( 24 - 276 ) ÷ 276] x 100 = -91.3%
Formula
Percentage change = [(24 - 276) / 276] x 100
Subtract the new number by the original number
24 - 276 = -252
-252 ÷ 276 = -0.9130434782608695
-0.9130434782608695 x 100 = -91.3%