Whoever gets it right and selects all the corret ones getsnbsp; also plz  

So the large rectangle is a 12x6
the shaded region is 3x3
you can write the proportion as
the top side of the shaded area over the top side of the big rectangle X the left side of the shaded area over the left side of the big rectangle
so
3/12 x 3/6

Hope this helps :)

Yes you do, so £1973.09 - £1473.50 = £499.59 so tim overpaid £499.59 .hope this ; )