-94.09% is the change from 254 to 15
Calculation steps:
[( 15 - 254 ) ÷ 254] x 100 = -94.09%
Formula
Percentage change = [(15 - 254) / 254] x 100
Subtract the new number by the original number
15 - 254 = -239
-239 ÷ 254 = -0.9409448818897638
-0.9409448818897638 x 100 = -94.09%