Question

Olivia’s and Sylvia’s allowances are in the ratio 2:3. If Sylvia gets $21 one week, how much did Olivia get?

Answer 1

If Sylvia's allowance is 3x, then Olivia, whose allowance is in a ratio of 2:3, receives an allowance of (2/3) * 3x = 2x.
If Sylvia gets $21, then 3x = $21.
Thus, x = $21/3 = $7.
Hence, Olivia receives 2x = 2 * $7 = $<<2*7=14>>14. Answer: \boxed{14}.