-94.77% is the change from 287 to 15
Calculation steps:
[( 15 - 287 ) ÷ 287] x 100 = -94.77%
Formula
Percentage change = [(15 - 287) / 287] x 100
Subtract the new number by the original number
15 - 287 = -272
-272 ÷ 287 = -0.9477351916376306
-0.9477351916376306 x 100 = -94.77%