Question

there are only red sweets and yellow sweets in a bag

2
- of the sweets are red
5

write down the ratio of red sweets to yellow

Answer 1

I think the ratio is 2:3

Answer 2

there are only red and yellow sweets
$red \: sweets \: = \frac{2}{5} \: of \: sweets \\ yellow \: sweets = 1 - \frac{2}{5} = \frac{3}{5} of \: sweet \\ required \: ratio \: = \frac{ \frac{2}{5} }{ \frac{3}{5} } = \frac{2}{3} \\ \\ required \: ratio \: is \: \frac{2}{3}$