The amount of money that Ahmed gave to his brother is AED 140.
It is given in the question that Ahmed has AED 180. He gives his brother 0.7 with bar notation of the amount he has.
We have to find the amount given by Ahmed to his brother.
Here, we have to convert a non-terminating but recurring rational number into fraction form.
Let 0.7 bar = x
Multiplying the equation by 10, we get
7.7 bar = 10x
10x - x = 7.7 bar - 0.7 bar
9x = 7
x = 7/9
Hence, Ahmed gave 7/9 of the amount he had to his brother.
Hence, we can write,
Amount given to Ahmed's brother by Ahmed = (7/9)*180 = AED 140.
To learn more about rational number, here:-
brainly.com/question/24398433
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