-93.98% is the change from 249 to 15
Calculation steps:
[( 15 - 249 ) ÷ 249] x 100 = -93.98%
Formula
Percentage change = [(15 - 249) / 249] x 100
Subtract the new number by the original number
15 - 249 = -234
-234 ÷ 249 = -0.9397590361445783
-0.9397590361445783 x 100 = -93.98%