16. 18/8/25 = 458/25 = 18.32
17. No because it cannot be written as ratio of two numbers
18. 3/3/11 + 3.27 = 36/11 + 35.97/11
= 6/5/11
19. ( not able to answer)
20. Diameter of pizza. = 10.333333
Length of the pizza box = 10.38
10.38 > 10.33333
Therefore, the pizza box is big enough to fit the pizza inside
21. 110/147/168 = 110/49/56
22. 4/5 = 0.8
5/6 = 0.8333333..................
Therefore, the second and the fifth might be correct.