## Scotty 5 years ago what is 3/5 of 30? and how do you work this out?

Whenever you say `some fraction OF some number', you can multiply the two together to get your number. So, in this case: 3/5 OF 30 means: $\frac{3}{5}\times 30$

Can you do that multiplication?

3. SCOTTY

No

4. SCOTTY

do I do 3*30 and then 5*30?

5. SCOTTY

AWESOME!

Hehe, sorry for abandoning you there for a minute. That was the equivalent of: $\frac{3}{5}\times \frac{30}{1}$ So you can multiply the 3 across and keep the 5, then do the division.

8. SCOTTY

Yes, it is. $\frac{3}{5} \cdot \frac{30}{1} = \frac{3 \cdot 30}{5 \cdot 1} = \frac{3 \cdot 6}{1} = \frac{18}{1} = 18$