-4.23% is the change from 662 to 634
Calculation steps:
[( 634 - 662 ) ÷ 662] x 100 = -4.23%
Formula
Percentage change = [(634 - 662) / 662] x 100
Subtract the new number by the original number
634 - 662 = -28
-28 ÷ 662 = -0.04229607250755287
-0.04229607250755287 x 100 = -4.23%