-49.47% is the change from 661 to 334
Calculation steps:
[( 334 - 661 ) ÷ 661] x 100 = -49.47%
Formula
Percentage change = [(334 - 661) / 661] x 100
Subtract the new number by the original number
334 - 661 = -327
-327 ÷ 661 = -0.4947049924357035
-0.4947049924357035 x 100 = -49.47%