Explain simply why 23 is the correct answer to: John has 10 members of his family on his father's side. His mother's side is 30% larger. How many people are there in total?. Explanation:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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His mother's side is 10 * .3 = 3 people larger than his father's side. So his mother's side has 10 + 3 = 13 people. So the total number of people is 13 + 10 = 23.