Final answer:
Katie can complete 2/3 of the craft project in one hour.
Step-by-step explanation:
To find out what fraction of the craft project Katie completes in one hour, we need to determine how many times 3/4 can fit into 1 hour. Since there are 60 minutes in an hour, we can convert 3/4 of an hour to minutes by multiplying it by 60. 3/4 x 60 = 45 minutes. So, Katie completes 2/3 of the craft project in 45 minutes. To find out how much she can complete in 1 hour, we need to scale the fraction. Since 45 minutes is 3/4 of an hour, 60 minutes is equivalent to 4/4 or 1 whole hour. Therefore, Katie can complete 2/3 of the craft project in one hour.