Ans: We can use Angle sum property:
A + B + C + D = 360
A + 3x + 2x + 5x = 360
A + 10x = 360
A = 360/10x= 36x
A = 36x
Given expression: 
In order to simplify it to get an equivalent expression, we need to multiply all terms.
Let us simplify 
Therefore, 

=
.
<h3>Therefore,

is equivalent to

</h3>
<span>How do you solve this math problem?
1-3/7=4/7</span>
Hello there! To solve types of questions like these, we can write and solve a proportion. We are looking for the percentage of 380 out of 863.6. Let's set up the proportion like this: 380/863.6 = x/100. Cross multiply the values in order to get 38,000 = 863.6x. Now, divide each side by 863.6 to isolate the "x". 38,000/863.6 is 44.00185271 or 44 when rounded to the nearest whole number. 380 is appox. 44% of 863.6.