Question 483795
Hi, I am 10, in grade 5 and am working with fractions so this is all new to me.  My math question is how to work out the following:  
<pre>
1) calculate {{{4/5}}} of 7kg. 

"Of" means "times"

So {{{4/5}}} of 7kg  means

{{{4/5}}} times 7kg  or

{{{4/5}}} × 7kg

We write 7kg as {{{expr(7/1)}}}kg so we have

{{{4/5}}}×{{{expr(7/1)}}}kg

We multiply the two numerators 4×7 and get 28 for the final numerator
We multiply the two denominators 5×1 and get 5 for the final denominator

{{{28/5}}}kg

but that is an improper fraction so we do this division:

 <u>  5</u> 
5)28
  <u>25</u>
   3

The whole part is 5 and the fractional part is gotten by
putting the remainder 3 over the divisor 5 and we get 

{{{5&3/5}}}kg
2) 3/4 of 5km.       <--- answer = {{{3&3/4}}}km
3) 4/6 of 2 days.    <--- answer = {{{1&1/3}}}days
4) 6/7 of 63litres.  <--- answer = {{{54}}}litres
5) 5/8 of R960       <--- (Was the R a typo?)  5/8 of 960 gives 600 
6) 5/6 of 3hrs       <--- answer = {{{2&1/2}}} hrs 
7) 9/12 of 132       <--- answer = 99

Edwin</pre>