Arecipe calls for 3/4 cup of butter. angie wants to triple the recipe, but she has only 1 5/8.

how much butter must she borrow from a neighbor?

So tripple of 3/4 is 3/4 times 3/1=9/4=2 and 1/4

so 1 and 5/8

1 ad 5/8+x=2 and 1/4
2=1+1
1=8/8
1/4=2/8
8/8+2/8=10/4
1 and 5/8+x=1 and 10/8
subtract 1 from both sides
5/8+x=10/8
subtract 5/8 from both sides
x=5/8

she must borrow 5/8 cups