Find three rational numbers equivalent to each of the following rational numbers.

(i) (-2)/5

(ii) 3/7

(i) (-2/5) = (-2 × 2)/(5 × 2) = -4/10

(-2/5) = (-2 × 3)/(5 × 3) = -6/15

(-2/5) = (-2 × 4)/(5 × 4) = -8/20

Hence, the required rational numbers are -4/10, -6/15, and -8/20.

(ii) (3/7) = (3 × 2)/(7 × 2) = 6/14

(3/7) = (3 × 3)/(7 × 3) = 9/21

(3/7) = (3 × 4)/(7 × 4) = 12/28

Hence, the required rational numbers are 6/14, 9/21, and 12/28.