Answer :

SlowZasob
If the ratio needs to be 2:7, we know that there are 9 (because 2 + 7 = 9) "parts" of that ratio. To find out how much does one "part" represent, we need to divide 72 by 9:

72 ÷ 9 = 8

No we just multiply 2 * 8 and 7 * 8:

2 * 8 = 16
7 * 8 = 56

So 72 pounds shared in 2 : 7 ratio is 16 : 56.
HolmesNWatson
In order to find the value of a ratio, you have to find one part of the ratio. In order to do this, you have to add the two values (2+7), that you split the ratios in, which gives you 9. You then divide this by the amount, which is £72. £72/9= £8. Therefore, one part is £8. In order to find what each one is worth, you have to multiply each part of the ratio by £8.
£8x2= £16, £8x7= £56.
Therefore, £72 split into the ratio of 2:7 is £16:£56 
Hope this helps :)