Math Is Fun Forum

Hello it was a long time agao since I was at school, anyway my question is this how do I times numbers like these

0.05 x 5.60 = (the answer is 0.28) but I am not sure how they got it.

I have tried setting the number up correctly like so:

   5.60
x 0.05
------

------

but all I get is 0.00 as the answer

Thanks

Joe

"How Many pieces of string each measuring 1.5m, can be cut from a ball which is 90m long?"

now i thought about saying to myself if it was 1m it would be 90 now since they want a meter and a half find half of 90 which 45 and take that away from 90 would that leave you with the answer?

Question 2

"a set male in a resturant is £5.60. if senior citizens are given 5% reduction, what would the bill amount to if 10 senior citizens had such a meal" 

this is what i had since there is 10 of them the bill would be 560 and the percent would be 50% so 50% of 560 is 280 so the bill would be £280, am i correct in thinking this

thanks

Joe

Hey all

I am trying to learn to multiply whole numbers by decimals so that I can work out percentages, I found this example in a book

"find 15% of 60 I understand how to convert it to decimal 15x100 is 0.15 and then it says 0.15x60 =9 but I dont understand where they got the nine from i tried multiplying 15x60 and i got 135 add the decimal point in and i get 1.35 but still no 9, if i can understand how this was done it would make my life that little easier.

thanks all

Joe

hey all,

I was wondering how do i work out percentages from money for example as shown below.

What percentage of £60 is £9?

In a police HQ car park there are 140 vehicles.  20% of these are police vehicles.  How many are non-police vehicles?

also....

How many 7 x 7cm tiles are needed to cover an area that measures 84 x 84cm?

is the right answer this 7*12 = 84, then 7*12 = 84 then 12*12 = 144 so i should need 144 tiles

hey all,

i have this question in my test (practice)

Q) If a car is travalling at 64 mph how many miles will it have travalled in 45 minutes?

this is what i did just take 15 minutes away, but it turned at i was wrong the answer is really 48 but i am not sure how they got it, i have even tried taking 15 away then adding from lets say 60 which gives me 45 then adding the 4 back on which gives me 49?

Plz Help

Joe

one more thing am i correct in think that 0.2 can also be written as a half or as 50 as a whole number?

hey all,

sorry for the lenght of my post i am hoping if somone can help me answer these questions as i am not sure how to work them out.

1) A traffic warden works a 40hr, 5-day week.  How many hours are worked per day?

2) In a drink drive campaign officers were instructed to stop ninety vehicles over a three-day period.  It was then decided to extend this for an extra 7 days.  How many vehicles were stopped in total over the seven extra days? (i came up with 270) but i think it is wrong

3) Ten people were required for a police identity parade.  Of the ten people chosen, one was guilty of the offence, what percentage were innocent?  (my answer was 99% but it said 90% how is that true)

5) What percentage of £60 is £9? (i can never seem to understand percentages, i know my tables kinda so is there anyway i can use my tables to work out percentages)

6) How many 7 x 7cm tiles are needed to cover an area that measures 84 x 84cm?

7) Two out of every eight motorists stopped at a DOT census are questioned.  If 408 motorists are stopped, how many are questioned?

thanks i would be greatfull if you can help