Question

jared bought a package of pens containing 20 pens.  If 3/4 of the pens had black ink, how do you determine the number of pens with black ink?

Answer 1

Well 1/4 of the pens would be 5 (20/4=5)
so 3/4 would be 5x3= 15
15 of the pens have black ink

Answer 2

Wouldn't you take .75 multiplied by 20? .75 is 3/4 obviously. <span />