Answer: Eric still needs
of a deck.
Step-by-step explanation:
You know that:
- Eric need 1/2 deck of playing cards.
- Eric has 2/7 of a deck.
Therefore, to find the fraction of a deck that Eric still needs, you must subtract 1/2 and 2/7:
- Find the least common multiple of the denominators:


- Now, you can make the subtraction:

Therefore, he still needs
of a deck.
1 marble = 2 chocolate
3 marble = 6 chocolate
They only ate 5 chocolate slices so they ate more marble.
One can be 7/2 ...................
17 is a prime number because it’s only divisible by 1 and it’s self, so it only has 2 factors.