Question

21/5-7/4= please tell
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Answer 1

Answer:

46/20

Step-by-step explanation:

21/5 - 7/4

81 -35 / 20

46/20

after cutting answer in decimal = 2.3

Answer 2

• We have to evaluate the above expression by using the given data.

              Given data:- $\frac{21}{5} -\frac{7}{4} .$

              To find:- Value of the given expression.

              Solution:-

• We will take the LCM of the denominators, and make denominators the same.

• We will Convert the given fractions to equivalent fractions with the denominator as the LCM.

• Adding the numerators over the denominators.

       Therefore,

            $\begin{array}{l}\frac{21}{5}-\frac{7}{4} \\\\=\frac{21 \times 4}{5 \times 4}-\frac{7 \times 5}{4 \times 5} \\\\=\frac{84}{20}-\frac{35}{20} \\\\=\frac{84-35}{20} \\\\=\frac{49}{20}\\\\=2.45.\end{array}$

       Hence we will get the value $\frac{49}{20}$ or $2.45.$