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