No.
13.5
First we convert to the same type, which is twenty-fourths: 6 twenty-fourths + 9 twenty-fourths + 10 twenty-fourths = 25 twenty-fourths or 1 and 1 twenty-fourth.
15km
18
Eighteen twenty-fourths.
No.
13.5
23 (Twenty three)
one sixteenth
20 and 3/4 minus 18 and 2/3 = 2 and 1/12
First we convert to the same type, which is twenty-fourths: 6 twenty-fourths + 9 twenty-fourths + 10 twenty-fourths = 25 twenty-fourths or 1 and 1 twenty-fourth.
12.25
15km
18
It is the same as: 6/8 -3/8 = 3/8
5