mengunakan cara ya..terima kasih ditunggu jawabannya sekarang 18/21 x 15/20 x 25/30 =

[tex] \frac{18}{21} x \frac{15}{20} x \frac{25}{30}\\\\ = \frac{6}{7} x \frac{3}{4} x \frac{5}{6}\\\\ = \frac{15}{28} [/tex]