Math Fraction, Percentage and ratio problem

Ok so there are 3 questions:
1. convert to percent:0.6666
2. express as ration in lowest terms: 4.5l to 2500 ml
3. John spent 1/5 of his savings on gifts before christmas. Then after christmas he spent 2/3 of what remained on after sales. How much of his savings remained?

PLEASE DONT USE CALC. and show your steps!! THANKS SO MUCH

I just did 1 & 2 on another of your questions

3) Let M = savings

Spent 1/5 of M leaving 4/5 M............1 - 1/5 = 5/5 - 1/5 = 4/5

Now if he is going to SPEND 2/3 of the 4/5M that means he
will still have left 1/3 of the 4/5M

1...4
--x--M
3...5

4
---M.............ANSWER
15

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