What is (65*51)/(68*78) ?

The solution to (65*51)/(68*78) is 5/8

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simplify (6551)/(6878)

simplify

\frac{65 \cdot 51}{68 \cdot 78}

\frac{5}{8}

Decimal Notation

0.625

Solution steps

\frac{65 \cdot 51}{68 \cdot 78}

Factor the number:

65 = 13 \cdot 5

= \frac{13 \cdot 5 \cdot 51}{68 \cdot 78}

Factor the number:

78 = 13 \cdot 6

= \frac{13 \cdot 5 \cdot 51}{68 \cdot 13 \cdot 6}

Cancel the common factor:

13

= \frac{5 \cdot 51}{68 \cdot 6}

Factor the number:

51 = 17 \cdot 3

= \frac{5 \cdot 17 \cdot 3}{68 \cdot 6}

Factor the number:

68 = 17 \cdot 4

= \frac{5 \cdot 17 \cdot 3}{17 \cdot 4 \cdot 6}

Cancel the common factor:

17

= \frac{5 \cdot 3}{4 \cdot 6}

Factor the number:

6 = 3 \cdot 2

= \frac{5 \cdot 3}{4 \cdot 3 \cdot 2}

Cancel the common factor:

3

= \frac{5}{4 \cdot 2}

Multiply the numbers:

4 \cdot 2 = 8

= \frac{5}{8}

(8 + 8 i) (- 3 + 9 i)

(11 + 7 i) (- 1 + 7 i)

(r + 7) (r - 4)

3 \div \frac{1}{8}

(- 1 - 5 i) + (- 6 - 9 i)