Stephanie had 7/8 pound of bird seed she used 3/8 of a pound to fill a bird feeder. how much bird seed does stephanie have left?

So first we can start with writing

7/8-total

3/8-amount used

_-amount left over

Then you can write an equation like 7/8-3/8

Since they have the same denominator, you don’t have to change it so

You subtract 7-3 which is 4 and you put 8 under( the denominator

So you can write:

7/8-3/8= 4/8

Or 7/8-3/8= 1/2

Because 4/8 can be simplified to 1/2