-3% is the change from 699 to 678
Calculation steps:
[( 678 - 699 ) ÷ 699] x 100 = -3%
Formula
Percentage change = [(678 - 699) / 699] x 100
Subtract the new number by the original number
678 - 699 = -21
-21 ÷ 699 = -0.030042918454935622
-0.030042918454935622 x 100 = -3%