The ratio of the weight of Meg’s cat to the weight of Anne’s cat is 5:7.
Meg’s cat weighs 20 kg.
How much more does Anne’s cat weigh?

Pat the Painter mixed 3 pints of yellow paint with 4 pints of green paint to make a nifty new color.
He used 27 pints of yellow paint.
How many pints of green paint will he need?

The ratio of boys to girls at the basketball game is 8:5.
There are 30 girls.
How many more boys are there than girls?

Craig and Brian looked for seashells.
For every 9 seashells Craig found, Brian found 7.
Craig found 54 seashells.
How many fewer seashells did Brian find than Craig?

There are 3 packs of crayons available for every 5 students in the art class.
How many students can share 15 packs of crayons?