-6.34% is the change from 678 to 635
Calculation steps:
[( 635 - 678 ) ÷ 678] x 100 = -6.34%
Formula
Percentage change = [(635 - 678) / 678] x 100
Subtract the new number by the original number
635 - 678 = -43
-43 ÷ 678 = -0.06342182890855458
-0.06342182890855458 x 100 = -6.34%