Someone me with this algebra question 100% correct only

The hockey team has been great! in 2008 they won 20% more games than in 2007. in 2009 they won 50% more games than in 2008. what was their overall percentage increase from 2007 through 2009?

Acollection of nickels and quarters is worth $2.85. there are 3 more nickels than quarters.how many nickels and quarters are there?

Grace paid $1.70 for 5 ounces of candy. how much did she pay for 24 ounces?