Write the ratio of in simplest form using colon form. Example: 5:6


a. 12 garbage cans to 3 classroom


b. 5 boxes to 100 mangoes


c. 12 books to 6 pupils


d. 1 liter to 500ml (Note: 1 liter = 1,000 ml)


e. 14 days to 3 weeks (Note: 1 week = 7 days)