How Many Tables Are Available at a Restaurant?

[Mary1]

A restaurant has 120 tables, but 30% of them are reserved how many tables are available. I cannot use a calculator so need the break down. I know this seems simple but have not used math in a very long time.

 

[I like Serena]

A restaurant has 120 tables, but 30% of them are reserved how many tables are available. I cannot use a calculator so need the break down. I know this seems simple but have not used math in a very long time.

Hi Mary! Welcome to MHB! (Smile)

If 30% are reserved, that means that 70% are available, since we have a total of 100%.
It means that we have $120 \times 70\%$ tables available.
How many would that be? (Wondering)

 

[Wilmer]

A restaurant has 120 tables, but 30% of them are reserved how many tables are available. I cannot use a calculator so need the break down. I know this seems simple but have not used math in a very long time.

Since you cannot use a calculator, here's a "trick":
assume 10%; that's easy enough; example:
10% of 400 = 40 (divide by 10).
So 30% = 120 (3 times more).
Get my drift?