I’m lost on this step

Savannah is painting a striped background for a mural on a wall that is 1515 yards long. she wants a total of 9696 stripes that are all the same width. which calculation should savannah use to decide how wide to make each stripe?

At $1.32 million, they closed last month percent above what they paid in 2007." how much did they pay in 2007?

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?