6:15 is greater then, less then or equal to 30:80?

Hello there,

6:15 is less than 30:80 because if we change the two ratios two fractions, 6:15=15/6 and 30:80=80/30. We can make the denominator the same - - > 15/6*5/5=75/30. 75/30>80/30, so therefore the ratio 6:15 is less than 30:80.