6/14+0,8+22,5% dijadikan pecaham biasa

6/14 =
0,8 = 8/10 = 4/5
22,5% = 225/100 = 9/4

3/7 + 4/5 + 9/4
15/35 + 28/25 + 9/4
43/35 + 9/4
1 8/35 + 630/280
1 64/280 + 630/280
1 694/280
1 + 2 134/280
3 67/140

semoga membantu