-79.35% is the change from 247 to 51
Calculation steps:
[( 51 - 247 ) ÷ 247] x 100 = -79.35%
Formula
Percentage change = [(51 - 247) / 247] x 100
Subtract the new number by the original number
51 - 247 = -196
-196 ÷ 247 = -0.7935222672064778
-0.7935222672064778 x 100 = -79.35%