hitunglah hasil dari ( 3/4 - 1/7) × ( 2/5+1/4) !

(3/4-1/7) × (2/5+1/4)
= (21/28-4/28) × (8/20+5/20)
= 17/28 × 13/20
= 221/560

[tex]( \frac{3}{4} - \frac{1}{7} ) \times ( \frac{2}{5} + \frac{1}{4} ) \\ = (\frac{21 - 4}{28} ) \times ( \frac{8 + 5}{20} ) \\ = \frac{17}{28} \times \frac{13}{20} \\ = \frac{221}{560} [/tex]