-79.44% is the change from 248 to 51
Calculation steps:
[( 51 - 248 ) ÷ 248] x 100 = -79.44%
Formula
Percentage change = [(51 - 248) / 248] x 100
Subtract the new number by the original number
51 - 248 = -197
-197 ÷ 248 = -0.7943548387096774
-0.7943548387096774 x 100 = -79.44%