Tolong, nomor 11&12. terima kasih.

12. wakaf = 1 - (1/3+1/5+1/6)
wakaf = 1 - (10/30+6/30+5/30)
wakaf = 1 - (21/30)
wakaf = 30/30 - 21/30
wakaf = 9/30
wakaf = 3/10 bagian

Semoga membantu.....