Answer:

5/28 is the remaining part of the land

Step-by-step explanation:

Given:

Father's land: 5/7 hectares

Given to his son: 1/2

Given to his daughter: 1/4

Solution:

(add the parts given to his son and daughter)

1/2 + 1/4 =? (Find the LCD)

(the LCD is 4)

2/4 + 1/4 = 3/4

(multiply father's land to the added fraction)

5/7 x 3/4 = 15/28 (multiply directly the numerator to the numerator and the denominator to the denominator)

15/28 is the total part of the land given to his son and daughter

(subtract)

5/7 - 15/28 =? (find the lcd, the lcd is 28)

20/28 - 15/28 = 5/28