-81.03% is the change from 348 to 66
Calculation steps:
[( 66 - 348 ) ÷ 348] x 100 = -81.03%
Formula
Percentage change = [(66 - 348) / 348] x 100
Subtract the new number by the original number
66 - 348 = -282
-282 ÷ 348 = -0.8103448275862069
-0.8103448275862069 x 100 = -81.03%