a: Anna has the least amount saved.
b:2,100 is the total amount of every bodies savings put together.
Since you already have 1,575 as info you can use that to divide by 15 because that is her ratio. If you divide it you get 105. You can use that for your other problems.
Anna has 210 dollars in savings. Beth has 315 dollars in savings. And Cynthia has 1,575 dollars in savings.