Sophie jogs four and one-fourth miles in seven-eighths hour. How far would she run in four and one-half hours if she kept the same pace?

Answer 1

4.25mi/0.875hr * 4.5hr = 21.86 mi

or, using fractions

(17/4 mi)/(7/8 hr) * (9/2 hr)
= 17/4 * 8/7 * 9/2 = 153/7 = 21 6/7 mi