-47.22% is the change from 648 to 342
Calculation steps:
[( 342 - 648 ) ÷ 648] x 100 = -47.22%
Formula
Percentage change = [(342 - 648) / 648] x 100
Subtract the new number by the original number
342 - 648 = -306
-306 ÷ 648 = -0.4722222222222222
-0.4722222222222222 x 100 = -47.22%