Let's solve the problem step by step:
You start with one whole pizza. In terms of fractions, this is represented by the number 1.
(i) Anshul eats 4/7 of the pizza.
To find out how much of the pizza is left, you subtract the amount that Anshul eats from the whole pizza:
The amount of the whole pizza is 1 (or 7/7 to have a common denominator with 4/7).
Anshul eats 4/7 of the pizza.
Now subtract the fraction that Anshul eats from the whole pizza:
Pizza left = Whole pizza - Fraction eaten by Anshul
Pizza left = 7/7 - 4/7
Pizza left = (7 - 4)/7
Pizza left = 3/7
So, the fraction of the pizza that is left after Anshul eats 4/7 of it is 3/7.