An oil tank contains 580 gallons. When 87 gallons of oils have been used, what percent of the 580 gallons are left in the tank?

Beth makes batches of bluberry muffins and banna muffins. each batchis 6 muffins. she makes 2.5 batches of bluberry muffins. how many batches of bananna muffins should beth make if she wants to have a total of 60 muffins?

What is not true about kl and mn? what is mn? (show your work)

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.