Explanation
Something like "2 over 7" is the same as 2/7
3/6 reduces to 1/2
To add the fractions, we must get each fraction to the LCD (lowest common denominator). In this case the LCD is 7*5*2 = 70
Get each fraction to have its denominator become the LCD
We can now add the numerators while keeping the denominator the same the entire time.
20/70 + 112/70 + 35/70 = (20+112+35)/70 = 167/70
That cannot be reduced further since the GCF of 167 and 70 is 1.
As a way to confirm the answer, you can use WolframAlpha. GeoGebra is another option.
