1/10 of 400,00 is 10 times as much as what explain

Diana is painting statues. she has 7/8 of a liter of paint remaining. each statue requires 1/20 of a liter of paint.how many statues can she paint? yeah dad i added the cup to the door now will you stop emailing me while im doing my homework.(lmbo xd i just realized this wooow)

Can someone me with this problem . show your work .

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33