Irene R. answered 03/25/20
BS in Mechanical Engineering and Certified math teacher for 13 years
This problem can be solved using equivalent ratios.
4 pens = 16 pens
5 pencils x pencils
Since 4 * 4 is 16 , multiply the numerator and denominator by 4 to find the number of pencils for 16 pens:
4 pens • 4 = 16 pens
5 pencils • 4 20 pencils