Question

when a rational no is subtracted from2/7 the difference is 4/5 find the rational no​

Answer 1

ANSWER

We will learn about subtraction of rational numbers. If a/b and c/d are two rational numbers, then subtracting c/d from a/b means adding additive inverse (negative) of c/d to a/b. The subtracting of c/d from a/b is written as a/b - c/d.

Thus, we have:

a/b - c/d = a/b + (-c/d), [Since additive inverse of c/d is -c/d]

$hope \: this \: helps \: you$

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Answer 2

Answer:

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Let the rational number be X

2/7-x= 4/5

2/7-4/5= X

-18/35= X

Let's check the answer:

= 2/7- (-18/35)

= 2/7+18/35

= 28/35= 4/5

Hope it helps