**Or... you can use the LCM (least common multiple) for your new denominator:**

**The LCM of 4 and 10 is 20...**

**Let's make the changes...**

**So again!**

**How about this one?**

**Which is greater: or ?**

**Let's use as our new denominator (it's the LCM):**

**So **

**Or... you can use the LCM (least common multiple) for your new denominator:**

**The LCM of 4 and 10 is 20...**

**Let's make the changes...**

**So again!**

**How about this one?**

**Which is greater: or ?**

**Let's use as our new denominator (it's the LCM):**

**So **