text: write 3 days to 5 weeks as a ratio in lowest terms.?   to get the answer, you first want to convert everything into the same units. usually the problem is easier when using whole numbers: 1,2,10 etc... with this problem take 5 weeks and turn it into a number of days. 7 days in the week, times 5 weeks, equals 35 days. 7*5=35. your ratio is then 3:35.   the lowest common multiple is one. your answer is already in lowest terms.