Answers

2015-08-27T19:32:00+08:00
James' age is 13. If his brother is 6 years older than James, then we could express his brother's age as 13+6.
  13+6 = 18. So, James' brother is 18 y.o.
If James is 13 y.o. and his brother is 18 y.o., then the fraction of James' age to his brother's age is 13/18.
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2015-08-27T20:45:44+08:00