Find the LCD 4 and 28 :
Factor each denominator into its primes :
4 = 2²
28 = 2² 7
Find the least common denominator 2² 7 = 28
LCD = 28
\(\frac{3}{4} - \frac{1}{28}\)
Adjust fractions based on the LCD :
\(\frac{3*7}{28} - \frac{1}{28}\)
\(\frac{3*7-1}{28}\)
\(= \frac{20}{28}\)
Cancel common factor 4 :
\(\frac{20/4}{28/4}\)
\(= \frac{5}{7}\)
hope this helps!
