The Keiko left the money for the gift C is 12 3/4 dollars.
Given that,
Keiko had $30 to spend on 3 presents. Gift A cost her 11 3/4 dollars, and Gift B cost her 5 1/2 dollars.
We have to find how much cash remained after gift C.
We convert the mixed number first
Gift A cost is 11 3/4=47/4
Gift B cost is 5 1/2=11/2
So, money left with Keiko for gift C:
Keiko spends money buying gift A is $47/4.
Keiko spends money buying gift B, $11/2.
The total money he got is $30.
Now, we can money left:
=- (47/4 + 11/2) + 30
=-69/4 + 30
=51/4
=12 3/4
Therefore, the money left with Keiko for gift C is 12 3/4.
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