Question

By what number should we multiply -15/28, so that the product may be -5/7?

Answer 1

Explanation:

Let the number be x

According to question,

x × 20 /−15 =7 /−5

​⇒x=

7×(−15) / (−5)×20

​⇒x= 21/22

So, The other number is 21/22.

​

Answer 2

4/3

Explanation:

First, multiply -15/28 with 4/3.

Second, you need to cross 28 with 7 and 15 with 3.

`( - 15)/(28) x (4)/(3) = ( - 5)/(7)`

Since 28 divided by 4 is 7, and 15 divided by 3 is 5, therefore this gives the result of 5/7 (with negative sign).

Hope it helps. Thanks!