# Fractions

Three-quarters of an unknown number are 4/5. What is 5/6 of this unknown number?

Result

x =  0.889

#### Solution:

$3/4 \ a = 4/5 \ \\ a = \dfrac{ 4 }{ 5 } \cdot \ \dfrac{ 4 }{ 3 } = \dfrac{ 16 }{ 15 } \doteq 1.0667 \ \\ x = \dfrac{ 5 }{ 6 } \cdot \ a = \dfrac{ 5 }{ 6 } \cdot \ 1.0667 = \dfrac{ 8 }{ 9 } \doteq 0.8889 = 0.889$

Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Be the first to comment!

#### Following knowledge from mathematics are needed to solve this word math problem:

Need help calculate sum, simplify or multiply fractions? Try our fraction calculator. Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation?

## Next similar math problems:

1. Cleaning windows
Cleaning company has to wash all the windows of the school. The first day washes one-sixth of the windows of the school, the next day three more windows than the first day and the remaining 18 windows washes on the third day. Calculate how many windows ha
2. UN 1
If we add to an unknown number his quarter, we get 210. Identify unknown number.
3. Unknown number
I think the number - its sixth is 3 smaller than its third.
4. One third
If 3/5 is 360, how much is 1/3?
5. Pears
There were pears in the basket, I took two-fifths of them, and left six in the basket. How many pears did I take?
6. New bridge
Thanks to the new bridge, the road between A and B has been cut to one third and is now 10km long. How much did the road between A and B measure before?
7. Equation with x
Solve the following equation: 2x- (8x + 1) - (x + 2) / 5 = 9
8. Simple equation 6
Solve equation with one variable: X/2+X/3+X/4=X+4
9. Eqn
Solve equation with fractions: 2x/3-50=40+x/4
10. Fraction + eq
Solve following simple equation with fractions: -5/6(8+5b) = 75 + 5/3b
11. Bag of peanuts
Joe eat 1/3 of a bag of peanuts, mark eat 1/4 of the remaining in the bag of peanuts, Alvin eat 1/2 of the remaining bag of peanuts, peter eat 10 peanuts, there are 71 peanuts left. Hon many peanuts were in the bags?
12. Eq-frac
Solve the following equation with fractions: h + 1/3 =5/3
13. Equation with fractions
Solve equation: ? It is equation with fractions.
14. Together
Grandfather, father, and son are carpenters. They decided to make a wardrobe. Father produces it for 12 hours, his son for 15 hours, and grandfather for 10 hours. How long will they make it together?
15. Unknown number
Identify unknown number which 1/5 is 40 greater than one tenth of that number.
16. Equation
Solve the equation: 1/2-2/8 = 1/10; Write the result as a decimal number.
17. Simple equation
Solve for x: 3(x + 2) = x - 18