-94.85% is the change from 291 to 15
Calculation steps:
[( 15 - 291 ) ÷ 291] x 100 = -94.85%
Formula
Percentage change = [(15 - 291) / 291] x 100
Subtract the new number by the original number
15 - 291 = -276
-276 ÷ 291 = -0.9484536082474226
-0.9484536082474226 x 100 = -94.85%