The piano measures 19/4 ft long, she has a 5 ft space. does she have enough room

She has more than enough space because 19/4 as a mixed number is 4 3/4. The piano will fit in the 5 ft. space. To find out how to make 19/4 a mixed number, you divide the 4 into the 9 and you put the remainder over the divisor.