Solve 4/12-9/7 | Microsoft Math Solver

Type a math problem

Evaluate

- \frac{2 0}{2 1} \approx - 0.952380952

Solution Steps

\frac{4}{1 2} - \frac{9}{7}

Reduce the fraction

\frac{4}{1 2} \approx 0.333333333

to lowest terms by extracting and canceling out

4

\frac{1}{3} - \frac{9}{7} \approx - 0.952380952

Least common multiple of

3

and

7

21

. Convert

\frac{1}{3} \approx 0.333333333

and

\frac{9}{7} \approx 1.285714286

to fractions with denominator

21

\frac{7}{2 1} - \frac{2 7}{2 1} \approx - 0.952380952

Since

\frac{7}{2 1} \approx 0.333333333

and

\frac{2 7}{2 1} \approx 1.285714286

have the same denominator, subtract them by subtracting their numerators.

\frac{7 - 2 7}{2 1} \approx - 0.952380952

Subtract

27

from

7

to get

- 20

- \frac{2 0}{2 1} \approx - 0.952380952

Quiz

\frac{4}{1 2} - \frac{9}{7}

Similar Problems from Web Search

9 / 12 + 4 / 8

a - 9 / a - 4

n - 7 / 8 = 3 / 5

12 - \frac{9}{3} - 2

7

12 - \frac{9}{3} - 2 \to 12 - (\frac{3}{3}) (\frac{3}{1}) - 2 \to 12 - \frac{3}{3} (\frac{3}{1}) - 2 \to

5 / 12 - 1 / 7

11 / 12 - 9 / 10

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\frac{1}{3}-\frac{9}{7}\approx -0.952380952

Reduce the fraction \frac{4}{12}\approx 0.333333333 to lowest terms by extracting and canceling out 4.

\frac{7}{21}-\frac{27}{21}\approx -0.952380952

Least common multiple of 3 and 7 is 21. Convert \frac{1}{3}\approx 0.333333333 and \frac{9}{7}\approx 1.285714286 to fractions with denominator 21.

\frac{7-27}{21}\approx -0.952380952

Since \frac{7}{21}\approx 0.333333333 and \frac{27}{21}\approx 1.285714286 have the same denominator, subtract them by subtracting their numerators.

-\frac{20}{21}\approx -0.952380952

Subtract 27 from 7 to get -20.