When carlos had one dog, he needed to serve 1/3 can of dog food\ each day, he adopted another dog and now he needs to serve a total of 5/6 can of dog food each day, how much extra does he have to feed his dogs now
if you change 1/3 into 2/6, you can see that he originally fed 2/6 of a can and now feeds 5/6 meaning that not he feeds an extra 3/6 which simplifies into 1/2
