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
Find the multiplicative inverse of `-1 xx (-2)/5`
Multiply `6/13` by the reciprocal of `-7/16`
Find the multiplicative inverse (reciprocal) of each of the following rational numbers:
Find the multiplicative inverse (reciprocal) of each of the following rational numbers:
If y be the reciprocal of rational number x, then the reciprocal of y will be ______.
The reciprocal of a positive rational number is ______.
The reciprocal of `(-5)/7` is ______.
A train travels `1445/2` km in `17/2` hours. Find the speed of the train in km/h.
`1/6` of the class students are above average, `1/4` are average and rest are below average. If there are 48 students in all, how many students are below average in the class?
