Answer:
28 times 4 over 7 = 16
Step-by-step explanation:
1 - Break down the word problem logically
In Mr. Changs class
there are 28 students in total
4 over 7 = 4/7 = out of every 7 students 4 are girls.
2 - Use mathematical reasoning
To figure out how many girls;
Out of the for every 7 students of the 28 total 4 are girls
With that in mind we'll need to know how many groups of 7 there are which is 28/7
We know now that there are 4 groups of 7 students, so with there being 4 girls in each group, we multiple 4 girls across each group which is 4 x 4
This equals 16
To summarize what I did, I divided 28 by 7 and multiplied that by 4 (How many girls per) which is the same as multiplying 28*4 and dividing that by 7
which is the same as 28 x 4/7
Reasoning
[tex]\frac{28~students}{1~class} * \frac{4~girls}{7~students} = \frac{28~students~*~4~girls}{7~students} = \frac{28~*~4}{7} = 16[/tex]
