Sederhanakan 2/3-(3/5-4/9)

2/3-(3/5-4/9)
= [tex] \frac{2}{3} [/tex] - ([tex] \frac{27-20}{45} [/tex]
= [tex] \frac{2}{3} [/tex] - ([tex] \frac{7}{45} [/tex]
= ([tex] \frac{30-7}{45} [/tex]
= 23/45

2/3-(3/5-4/9) = 30/45 - (27/45 - 20/45)
= 30/45 - (7/45)
= 30/45 - 7/45
= 23/45