Write two different mixed numbers where the LCD (lowest common denominator) is 15.

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

It takes jonas 7 1/4 minutes to run the mile. it takes mario 8 5/12 to run the mile. how much faster is jonas than mario? 5/6 minute 1 1/3 minutes 1 1/6 minutes 1 1/2 minutesi will give points and brainlest

Could somebody me with this radical simplification?