Question

Q.3 By what numbers should we multiply − 15 20 so that the product may be 5 7 ?​

Answer 1

Answer:

Answer :- 20/21 .

Step-by-step explanation:

let the number to be X .

-15/20 * X = 5/7

X = 5/7 ÷ (-15/20)

the reciprocal of (-15/20) = (-20/15) .

X = 5/7 * - 20/15

X = 20/21 .

Hence , the number is 20/21 .