0.79 means 79/100, so...
7 and 79/100
===========to do this with any decimal.....
place,
.79/1
move decimal places all the way right to whole numbers
79/100
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7.79 = 779/100
0.714285 does not convert to a mixed fraction, just a fraction. It is: 142857/200000
because a proper fraction is less than1 and a mixed fraction is greater than 1
You can either add the fractional parts and, if required, convert the answer to a mixed fraction and then add the integer part to the integer parts of the two original numbers; or change both numbers to top-heavy (or improper) fractions, add them and then convert the answer to a mixed fraction.
Use a catolator