Pedro's book weighs 19/4 pounds. Blanca's book weighs 17/7 pounds. Use estimation to determine about how much more Perdro's book wweighs than Blanca's. A 1lbs
Sorry I meant math.
B 2lbs

C 6lbs
D 7lbs

2pounds

Explanation:

Given parameters:

Weight of Pedro's book  = pounds

Weight of Blanca's book  = pounds

Unknown:

How much more does Pedro's book weigh more than Bianca's book ?

Solution:

To Solve this problem, let us convert the fractions to decimal;

   Weight of Pedro's book  = 4.75 pounds

   Weight of Bianca's book  = 2.43 pounds

Differences  = 4.75pounds - 2.43 pounds

                     = 2.32 pounds

Estimating gives 2pounds