Unlimited Practice: Rates, Ratios & Proportions

There are 960 straws. If there are 540 black straws and the rest are orange straws. What is the ratio of black straws to orange straws?

The ratio of white markers to pink markers is 5:2. If there are 140 markers, how many pink markers are there?

The ratio of blue marbles to red marbles is 1:2. If there are 15 marbles, how many red marbles are there?

The ratio of nuppies to powlows is 6:5, and the ratio of powlows to abcots is 6:3. What is the ratio of nuppies to abcots?

The ratio of white marbles to yellow marbles is 3:4. If there are 140 marbles, how many yellow marbles are there?