MHB How Many Tables Are Available at a Restaurant?

  • Thread starter Thread starter Mary1
  • Start date Start date
AI Thread Summary
A restaurant has 120 tables, with 30% reserved, leaving 70% available. To calculate the available tables, multiply 120 by 70%, which equals 84 tables. A breakdown method suggests first calculating 10% of 120, which is 12, and then multiplying by 7 to find 70%. This approach simplifies the math for those who cannot use a calculator. Ultimately, 84 tables are available for customers.
Mary1
Messages
1
Reaction score
0
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.
 
Mathematics news on Phys.org
Mary said:
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)
 
Mary said:
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?
 

Thread 'What Exactly is Dirac’s Delta Function? - Insight'

Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. In Dirac’s Principles of Quantum Mechanics published in 1930 he introduced a “convenient notation” he referred to as a “delta function” which he treated as a continuum analog to the discrete Kronecker delta. The Kronecker delta is simply the indexed components of the identity operator in matrix algebra Source: https://www.physicsforums.com/insights/what-exactly-is-diracs-delta-function/ by...
View full post »

Thread 'Non-orthogonal bases'

Suppose ,instead of the usual x,y coordinate system with an I basis vector along the x -axis and a corresponding j basis vector along the y-axis we instead have a different pair of basis vectors ,call them e and f along their respective axes. I have seen that this is an important subject in maths My question is what physical applications does such a model apply to? I am asking here because I have devoted quite a lot of time in the past to understanding convectors and the dual...
View full post »
Thread 'Imaginary Pythagorus'

Thread 'Imaginary Pythagorus'

I posted this in the Lame Math thread, but it's got me thinking. Is there any validity to this? Or is it really just a mathematical trick? Naively, I see that i2 + plus 12 does equal zero2. But does this have a meaning? I know one can treat the imaginary number line as just another axis like the reals, but does that mean this does represent a triangle in the complex plane with a hypotenuse of length zero? Ibix offered a rendering of the diagram using what I assume is matrix* notation...
View full post »

Similar threads

B Creating Log Tables: Briggs' 400-Year-Old Accomplishment
Replies
10
Views
2K
B How reliable are logarithm tables?
Replies
7
Views
3K
I The Price of Beer - Linear Algebra Problem
Replies
44
Views
5K
MHB How Can a Random Number Table Be Used to Sample Cotton-Top Tamarins?
Replies
1
Views
1K
MHB Ferris Wheel Rotation: How Many Degrees Per Minute?
Replies
2
Views
2K
MHB Calculating Z-Scores for Krabby Patty Sales: Help and Examples
Replies
1
Views
3K
B It works but why? (Matching experimental data to a random equation)
Replies
3
Views
1K
B Fractional/decimal powers
Replies
10
Views
2K
I What is the probability of a cable having a breaking load greater than 6200 N?
Replies
5
Views
1K
MHB Mechanics- connected particles
Replies
3
Views
798

Hot Threads

Recent Insights

Back
Top