-64.13% is the change from 276 to 99
Calculation steps:
[( 99 - 276 ) ÷ 276] x 100 = -64.13%
Formula
Percentage change = [(99 - 276) / 276] x 100
Subtract the new number by the original number
99 - 276 = -177
-177 ÷ 276 = -0.6413043478260869
-0.6413043478260869 x 100 = -64.13%