Question

how many one-fourths need to be added to 2 1/4to make 4?

Answer 1

let we need x number of 1/4 to make 4
now
$2 \frac{1}{4} + \frac{x}{4} = 4$
on simplifying we get
(9/4) + (x/4) = 4
multiplying both sides by 4
9 + x = 16
so x = 7
so we need 7 one-fourths to make 4 from 2(1/4)