-94.74% is the change from 247 to 13
Calculation steps:
[( 13 - 247 ) ÷ 247] x 100 = -94.74%
Formula
Percentage change = [(13 - 247) / 247] x 100
Subtract the new number by the original number
13 - 247 = -234
-234 ÷ 247 = -0.9473684210526315
-0.9473684210526315 x 100 = -94.74%