1. How do I know if my ratio is in simplest form?

2.  A fraction is in simplest form when the numerator and denominator have no common factors other than 1.

3. But Mrs. Leonard – What are divisibility rules?  Use some simple divisibility rules 

4.  A number is divisible by 2 if : the number is even  A number is divisible by 5 if: the number ends in a zero or a five  A number is divisible by 10 if: the number ends in a zero  When all else fails try 3.

5. The numerator and the denominator are both EVEN Divide by 2 ÷

6. The numerator and the denominator both end in 5 Divide by 5 ÷

7. The numerator and the denominator both end in 0 ÷ Divide by 10

9. What is the ratio of cats to jack-o-lanterns?

10. What is the ratio of candy corn to candy apples?

11. There are 20 little Witches and 30 little Frankensteins at a Halloween Party. What is the ratio of Frankensteins to Witches?