-38.1% is the change from 126 to 78
Calculation steps:
[( 78 - 126 ) ÷ 126] x 100 = -38.1%
Formula
Percentage change = [(78 - 126) / 126] x 100
Subtract the new number by the original number
78 - 126 = -48
-48 ÷ 126 = -0.38095238095238093
-0.38095238095238093 x 100 = -38.1%