Advertisements
Advertisements
Question
By what numbers should we multiply `(-15)/20` so that the product may be `(-5)/7`?
Advertisements
Solution
Let the required number be x.
According to the question,
`x xx (-15)/20 = (-5)/7`
`x = (-5)/7 xx 20/(-15) = 20/21`
Hence, the required number is `20/21`.
APPEARS IN
RELATED QUESTIONS
Write : The rational numbers that are equal to their reciprocals.
Find the multiplicative inverse (reciprocal) of each of the following rational numbers:
9
Find the multiplicative inverse (reciprocal) of each of the following rational numbers:
Find the multiplicative inverse (reciprocal) of each of the following rational numbers:
The reciprocal of `2/5 xx ((-4)/9)` is ______.
The multiplicative inverse of `(-3)/5` is `5/3`.
The reciprocal of x–1 is `1/x`.
A train travels `1445/2` km in `17/2` hours. Find the speed of the train in km/h.
Can you find a rational number whose multiplicative inverse is –1?
