Heather rode her bicycle 3 5/6 miles in 2/3 of hour. What was her average speed in miles per hour?

Answer 1

an hour is 1.5 times 2/3 of an hour

1.5(3 5/6) = 4.75 mph

UNLESS you meant 35/6 miles in 5/6 of an hour

then

1.5(35/6) = 35/6 x 3/2 = 35/4 = 8.75 mph

which does seem more realistic for a bicycle speed

4.75 mph is normal walking speed