Respuesta :

3/4m=5 1/4
3/4m= 21/4
M=(21/4) / (3/4)
M=21/4 * 4/3
M=7

Check
3/4(7) = 21/4
21/4=21/4 (correct)

So Laura hiked 7 miles and Juanita hiked 3/4 of miles which equals 5 1/4miles