-93.93% is the change from 247 to 15
Calculation steps:
[( 15 - 247 ) ÷ 247] x 100 = -93.93%
Formula
Percentage change = [(15 - 247) / 247] x 100
Subtract the new number by the original number
15 - 247 = -232
-232 ÷ 247 = -0.9392712550607287
-0.9392712550607287 x 100 = -93.93%