-47.88% is the change from 660 to 344
Calculation steps:
[( 344 - 660 ) ÷ 660] x 100 = -47.88%
Formula
Percentage change = [(344 - 660) / 660] x 100
Subtract the new number by the original number
344 - 660 = -316
-316 ÷ 660 = -0.47878787878787876
-0.47878787878787876 x 100 = -47.88%