How do I do fractions and comparing them

15 : 3 = 5. Explain why it is true that 1.5 : 0.3 and 0.15 : 0.03 have the same quotient.

Michelle poured 7/8 cup of water from a pitcher into a glass. Then she poured another 2/3 cup. What is the change in the amount of water in the pitcher? Explain.

How do you solve this: 1.8 : 0.08

For every 6 boxes sold, Stephanie makes a profit of $8.10. Which table shows this same rate of change?

Total Weight (in pounds) 12, 18, 30, 60 Number of Books 10, 15, 25, 50 A. Does the table represent a proportional relationship? B. If the relationship is proportional, what is the constant of proportionality?

What's 2 and 5/10 in standard decimal form

There were 9500 spectators at a football match. 6375 of them were men. Of the remaining spectators, there were 4 times as many children as women. How many children were there?

A roofing company sells roofing material for $12 per aquare yards. How many square yards of roofing material can be purchased for$900.

A bakery sells 3 muffins for every 5 pizzas pies. The bakery sold a total of 24 muffins and pizza pies together. How many of each kind did the bakery sell

The measure of central angle ABC is pi/2 radians. What is the area of the shaded sector? I know the answer is 9 pi units^2 but I just need an explanation