-81.09% is the change from 349 to 66
Calculation steps:
[( 66 - 349 ) ÷ 349] x 100 = -81.09%
Formula
Percentage change = [(66 - 349) / 349] x 100
Subtract the new number by the original number
66 - 349 = -283
-283 ÷ 349 = -0.8108882521489972
-0.8108882521489972 x 100 = -81.09%