Question

can you tell me please that how (d/20)+(d/30)becomes (d/12) ?
where is my answer

Answer 1

Process in the attachment; hope it helped.

Answer 2

Explanation:

Let us solve the question give proper explanation side-by-side.

$\frac{d}{20} + \frac{d}{30}$

Taking LCM of the denominators of both the given fractions,

LCM of 20 and 30 = 60

Now, converting the fractions to like fractions i. e. having same denominator.

$\frac{d}{20} \times \frac{3}{3} + \frac{d}{30} \times \frac{2}{2}$

Now, performing simple multiplication,

$\frac{3d}{60} + \frac{2d}{60}$

Now we can write as,

$\frac{3d + 2d}{60}$

Performing simple addition of numerator,

$\frac{5d}{60}$

Now, taking out common of the fraction,

$\frac{5d}{5 \times 12}$

$\frac{d}{12}$