-48.88% is the change from 669 to 342
Calculation steps:
[( 342 - 669 ) ÷ 669] x 100 = -48.88%
Formula
Percentage change = [(342 - 669) / 669] x 100
Subtract the new number by the original number
342 - 669 = -327
-327 ÷ 669 = -0.48878923766816146
-0.48878923766816146 x 100 = -48.88%