-83.71% is the change from 313 to 51
Calculation steps:
[( 51 - 313 ) ÷ 313] x 100 = -83.71%
Formula
Percentage change = [(51 - 313) / 313] x 100
Subtract the new number by the original number
51 - 313 = -262
-262 ÷ 313 = -0.8370607028753994
-0.8370607028753994 x 100 = -83.71%