15 1 per 4 + 16 1 per 2 -10,25 adalah pakai cara

[tex]15 \frac{1}{4} + 16 \frac{1}{2} = \frac{61}{4} + \frac{33}{2} \\ = \frac{61}{4} + \frac{66}{4} = \frac{127}{4} = 31.75 \\ 31.75 - 10.25 = 21.5[/tex]
semoga membantu