-81.56% is the change from 347 to 64
Calculation steps:
[( 64 - 347 ) ÷ 347] x 100 = -81.56%
Formula
Percentage change = [(64 - 347) / 347] x 100
Subtract the new number by the original number
64 - 347 = -283
-283 ÷ 347 = -0.8155619596541787
-0.8155619596541787 x 100 = -81.56%