if you multiply 2/7 by 6 which is 12/42 and 1/6 times 7 which is 7/42 and add both fractions you will get 19/42 which is 0.45 you can either say the answer is 0.45 or 19/42.
The first thing you need to know is that we are adding because it says "How much did they eat in <em>all</em>?" Then, need to write down the common denominator of both 7 an 6. That is, 42. Now you have, 2/7+1/6= ?/42. Now you need to find out what the value of the numerator. We have to multiply 2 and 6 together, we will get 12. Then we got to do the same thing with 1x7, that will be 7.
