-15.61% is the change from 756 to 638
Calculation steps:
[( 638 - 756 ) ÷ 756] x 100 = -15.61%
Formula
Percentage change = [(638 - 756) / 756] x 100
Subtract the new number by the original number
638 - 756 = -118
-118 ÷ 756 = -0.15608465608465608
-0.15608465608465608 x 100 = -15.61%