-3.78% is the change from 688 to 662
Calculation steps:
[( 662 - 688 ) ÷ 688] x 100 = -3.78%
Formula
Percentage change = [(662 - 688) / 688] x 100
Subtract the new number by the original number
662 - 688 = -26
-26 ÷ 688 = -0.0377906976744186
-0.0377906976744186 x 100 = -3.78%