You'll solve the numerator first, that is :
8 * 5 + 2 * 7
The rule of BODMAS says that multiplication comes before addition
So,
40 + 14 = 54
Then solve the denominator,
2(7-4)
The rule of BODMAS says that bracket comes before multiplication
So, you solve the one in the bracket
7 - 4 = 3
2(3) = 6
54/6 = 9
