420 g of food was placed in a hamster’s cage.
On the first day, the hamster ate of the food.
On the second day, the hamster ate of the food.
On the third day, the hamster ate 41 g of the food and some food was left.
(a) Find the mass of food the hamster ate on the first day.
(b) Find the mass of food left at the end of the third day.
(a) Amount eaten on 1st day:
(b) Amount remaining at the end of the 3rd day: