-71.79% is the change from 351 to 99
Calculation steps:
[( 99 - 351 ) ÷ 351] x 100 = -71.79%
Formula
Percentage change = [(99 - 351) / 351] x 100
Subtract the new number by the original number
99 - 351 = -252
-252 ÷ 351 = -0.717948717948718
-0.717948717948718 x 100 = -71.79%