Sam's dad spends ½ of his salary every month on rent and 2/5 on petrol . What fraction is left to spend on food and other necessities for the month?

Answer 1

Sam's dad spends:

1 / 2 + 2 / 5 = 5 / 10 + 4 / 10 = 9 / 10

of his salary every month on rent and on petrol

1 - 9 / 10 = 10 / 10 - 9 / 10 = 1 / 10

is left to spend on food and other necessities for the month

Answer 2

1/2 × 2/5= 2/10