Answer:
6 3/8 ft tall
Explanation:
Multiply the girl's height by 1 1/2 to find the boy's height.
1 1/2 * 4 1/4 =
(1+1/2) * (4+1/4) =
(2/2+1/2) * (16/4+1/4) = ==> make common denominators to simplify
the sum of the fractions
((2 + 1)/2) * ((16 + 1)/4) =
(3/2) * (17/4) = ==> simplify
(3*17) / (2*4) =
51/8 = ==> make this into a mixed fraction
(48 + 3)/8 = ==> 48 is a multiple of 8
48/8 + 3/8 = ==> simplify
6 + 3/8 = 6 3/8 ft tall