no. 12 aja kak pakai cara ya!

3¾ kg - 5/6 kg - 0,8 kg - 0,25 kg
= 15/4 - 5/6 - 8/10 - 25/100
=1125 /300 - 250/300 - 240/300 - 75/300
= 560/300 = 28/15 = 1 13/15
jadi gula yang digunakam untuk membuat teh manis 1 13/15 kg (C)

jawab
=3 3/4-5/6-0,8-0,25
=(15/4-5/6)-(8/10+1/4)
=90/24-20/24-(4/5+1/4)
=70/24-21/20
=350/120-126/20
=224/20
=112/10
=56/5
Jawabannya C=1 13/15