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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?

Sagot :

wouldn't you take .75 multiplied by 20? .75 is 3/4 obviously. 
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