Answer:
add: 1; 2 / 5
Subtract: 1; 2/5
Multiply: 47 / 64
Divide: 33 / 42
Explanation:
Add: 11 / 15 + 2 / 3
Make 2 / 3 denominator equal to the other side
3 * 5 = 15
2 * 5 = 10
11 / 15 + 10 / 15
add the numerators
21 / 15 = 1; 6 / 15 simplify 1; 2 / 5
Subtract: 8 - 6; 3/5
Lets turn 8 into a improper fraction
5 * 8 = 40
40 / 5 - 6; 3/5
Lets make 6; 3/5 into a improper fraction
5 * 6 = 30
30 + 3 = 33
33 / 5
40 / 5 - 33 / 5
40 - 33 = 7
7 / 5
Turn this into a mixed fraction
1; 2/5
Multiply: 3 / 8 * 2; 3 / 8
Turn 2; 3/8 into a improper fraction
8 * 2 = 16
16 + 3 = 19
19 / 8
3 / 8 * 19 / 8
Multiply numerators
3 * 19 = 47
Multiply denominators
8 * 8 = 64
47 / 64
Divide: 3/7 ÷ 6 / 11
Use KCF -> Keep Change Flip
Keep 3/7
Change ÷ to *
Flip 6 / 11 to 11 / 6
3 / 7 * 11 / 6
multiply numerators
3 * 11 = 33
Multiply Denominators
7 * 6 = 42
33 / 42