Question

Kelly has a ribbon that 60 inch long she cuts 40% of the ribbon for an art project while working on the project she decided she only needs 75% of the piece she cut off how many inches of ribbon does Kelly end up using for her project

Answer 1

In order to compute percentages, just divide the total by 100, and multiply by the percentage you're looking for.

So, 40% of 60 is

`60\cdot (40)/(100) = 60 \cdot (4)/(10) = 6\cdot 4 = 24`

Similarly, 75% of this amount is

`24 \cdot (75)/(100) = 24\cdot (3)/(4) = 6\cdot 3 = 18`

Notice that you could have done this in one step by computing

`60 \cdot (40)/(100) (75)/(100) = 18`

So, she used 18 inches of ribbon