-48.26% is the change from 661 to 342
Calculation steps:
[( 342 - 661 ) ÷ 661] x 100 = -48.26%
Formula
Percentage change = [(342 - 661) / 661] x 100
Subtract the new number by the original number
342 - 661 = -319
-319 ÷ 661 = -0.4826021180030257
-0.4826021180030257 x 100 = -48.26%