-85.3% is the change from 347 to 51
Calculation steps:
[( 51 - 347 ) ÷ 347] x 100 = -85.3%
Formula
Percentage change = [(51 - 347) / 347] x 100
Subtract the new number by the original number
51 - 347 = -296
-296 ÷ 347 = -0.8530259365994236
-0.8530259365994236 x 100 = -85.3%