Let the number be n:
[tex]n - \frac{3}{4} n = 28[/tex]
LCD (Least Common Denominator) is 4. Multiply each term by 4, simplify each term, if needed. Then solve for n.
[tex](4)n - 4( \frac{3}{4}n)= (4)(28) [/tex]
4n - 3n = 112
n = 112.
The number is 112.
To check:
[tex]112- ( \frac{3}{4})(112) = 28 [/tex]
112 - 84 = 28
28 = 28
