-87.45% is the change from 247 to 31
Calculation steps:
[( 31 - 247 ) ÷ 247] x 100 = -87.45%
Formula
Percentage change = [(31 - 247) / 247] x 100
Subtract the new number by the original number
31 - 247 = -216
-216 ÷ 247 = -0.8744939271255061
-0.8744939271255061 x 100 = -87.45%