Total length of the string Kevin has = 3/4 yard.
He used 1/3 of the total length of the string.
We have total length 3/4 yards.
Therefore, we need to find the 1/3 of 3/4 yards.
1/3 × 3/4
We can see that we have 3 in the bottom of first fraction and 3 on the top of second fraction.
Crossing out 3's we get,
= 1/4 yards.