Fraction's

⅗ of 30=18

30 ÷ 5=6

6 X 3=18

⅞ of 40=35

40 ÷ 8 = 5

5 X 7 = 35

4/6 of 42 =28

6 ÷ 42 = 7

7 X 4 = 28

⅔ of 33 =22

33 ÷ 3 = 11

11 X 2 = 22

3/10 of 100 =30

100 ÷ 10 = 10

10 X 3 = 30