B
Step-by-step explanation:
We have
![What is the unknown fraction? 100 POINTS unknown, №18010572, 25.07.2020 16:27](/tpl/images/2698/0835/78e8d.png)
+
![What is the unknown fraction? 100 POINTS unknown, №18010572, 25.07.2020 16:27](/tpl/images/2698/0835/45f39.png)
=
![What is the unknown fraction? 100 POINTS unknown, №18010572, 25.07.2020 16:27](/tpl/images/2698/0835/6e371.png)
We can multiply
![What is the unknown fraction? 100 POINTS unknown, №18010572, 25.07.2020 16:27](/tpl/images/2698/0835/45f39.png)
by 10 to get
![What is the unknown fraction? 100 POINTS unknown, №18010572, 25.07.2020 16:27](/tpl/images/2698/0835/63d53.png)
.Now we have
![What is the unknown fraction? 100 POINTS unknown, №18010572, 25.07.2020 16:27](/tpl/images/2698/0835/78e8d.png)
+
![What is the unknown fraction? 100 POINTS unknown, №18010572, 25.07.2020 16:27](/tpl/images/2698/0835/63d53.png)
=
![What is the unknown fraction? 100 POINTS unknown, №18010572, 25.07.2020 16:27](/tpl/images/2698/0835/6e371.png)
.Now it's a simple case of subtracting
![What is the unknown fraction? 100 POINTS unknown, №18010572, 25.07.2020 16:27](/tpl/images/2698/0835/63d53.png)
from both sides to get us
![What is the unknown fraction? 100 POINTS unknown, №18010572, 25.07.2020 16:27](/tpl/images/2698/0835/6d4f7.png)
. This would be answer B.
If I am incorrect in my reasoning, please let me know so that I can plan better for my future answers. Have an amazing day.