-48.64% is the change from 662 to 340
Calculation steps:
[( 340 - 662 ) ÷ 662] x 100 = -48.64%
Formula
Percentage change = [(340 - 662) / 662] x 100
Subtract the new number by the original number
340 - 662 = -322
-322 ÷ 662 = -0.486404833836858
-0.486404833836858 x 100 = -48.64%