Answer :

Add Daniel's current age and 15

Then add Chris' current age and 14
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Daniel: 

[tex]2 \frac{1}{2} + 15 [/tex]

Write mixed number as an improper fractions and add 1 as a denominator for 15.

[tex] \frac{5}{2} + \frac{15}{1} [/tex]

Both denominators should be of same number so, multiply [tex] \frac{15}{1} [/tex] by 2

[tex] \frac{5}{2} + \frac{30}{2} = \frac{35}{2} [/tex]

Write [tex] \frac{35}{2} [/tex] as a mixed number which gives us:

[tex]17 \frac{1}{2} [/tex]

Daniel's Age in 15 years would be [tex]17 \frac{1}{2} [/tex]
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Chris:

2 + 14 = 16

Chris' age in 14 years would be 16