-48.05% is the change from 666 to 346
Calculation steps:
[( 346 - 666 ) ÷ 666] x 100 = -48.05%
Formula
Percentage change = [(346 - 666) / 666] x 100
Subtract the new number by the original number
346 - 666 = -320
-320 ÷ 666 = -0.4804804804804805
-0.4804804804804805 x 100 = -48.05%