1½ = Twelve eighths so the answer is seven-eighths
7 1/2 is greater
Twelve minus seven is five
23 and a half minus seven and five eighths equals 15.875
One minus one eighth is seven eighths.
1/8
Ten minus nine eights equals eight and seven eighths.
2 3/4
0.625
1/2
Answer = seven eighths of an inch.
It is one negative half.