450 g in 2:13
Total proportion asked for =2+13=15
Now comparing g with ratio, or whatever
450/15=30g [tex]\implies[/tex] Therefore 1 in ratio depicts of 30g
So final answer = [tex]\boxed{60g : 390g} [/tex]
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More to know, daily bit of knowledge: The Binomial Theorem:
[tex]\boxed{{(a+b)} ^n= \sum_{k=0}^{n}\binom{n}{k} a^{n-k}b^{k}}[/tex]