The fractional part of this number is what needs the focus. The whole number is 7, so we know that the decimal will lie somewhere between 7 and 8 (it will be 7 point something). All we have to do is convert 5/6 To decimal and attach it to the 7...
To find the decimal just do the math described by the fraction. 5/6 literally reads 5 ÷ 6. Set up the division and the result is .8333
So the decimal form of 7 5/6 is 7.8333
Alternatively you can set it up as a ratio then solve for x.
Z is directly proportional to x, that means : z = k.x, with k is the coefficient of proportionality: Let calculate k: When x = 5, z = 55. Plug in: 55 = k.5 → k=55/5 ; k =11 The value of z when = 12 is : z= kx; z = 11(12) and z = 132