Navigate to Google.
In the search bar type the fraction problem you wish to solve. For example, you could type: 4/7 - 10/5
Hit "Enter" or select "Google Search". The first result should be the answer to the problem.
Navigate to WolframAlpha.
In the text input box at the center of the page, type the fraction problem you wish to solve. For example: 4/5 - 10/5.
Hit "Enter" on your keyboard. The result, in a number of different formats, will be displayed.
Delete the information in the search bar to enter another fraction problem.
Hover your mouse over the different results to save the result as an image or copy the plaintext.