Question

Bill has 2/3 of his pizza left from lunch. If he eats 3/7 more of the pizza, how much pizza is left?

A) 1/4
B) 1/3
C) 1/21
D) 5/21

Answer 1

he has eaten 7/21 already. if he eats 9/21 from the 14/21 left, he will have 5/21 left. the answer is d

Answer 2

Option D) 5/21 pizza is left.

Explanation:

Bill has 2/3 of his pizza left from lunch. If he eats 3/7 more of pizza then we have calculate the pizza left.

Let the size of a pizza is x. Now 2x/3 pizza is left with Bill after lunch.

Therefore pizza eaten by Bill = x - 2x/3 = x/3

Now Bill eats 3/7 more of pizza has been eaten by Bill.Therefore total pizza left is

x - x/3 - 3x/7 = x(1 - 1/3 - 3/7) = x( 21 - 7 - 9)/21 = 5x/21

So 5/21 part of pizza is left.