Question 286559
Let A = piece 1 is 32.3cm

Let B = piece 2 is 41.19cm

Let C = piece 3 is 57.8cm

The total needed is 200cm for the box.

If we add A + B + C, the total ribbons is 131.29cm.

How much is Marie over or under what she needs? 

Marie is definitely under in terms of cm.

By how much is she under?

Subtract 131.29cm from 200cm and you shall have the answer.

Can you do it now?