To compare ratios, you need to have a common second number. By multiplying each ratio by the second number of the other ratio, you can determine if they are equivalent. Multiply both numbers in the first ratio by the second number of the second ratio.
So find how much was eaten 1/6 and 2/3=eaten add 1/6 and 2/3 convert bottom number to same 2/3=4/6 1/6+4/6=5/6 5/6 eaten 3-5/6= 2+1-5/6= 2+6/6-5/6= 2+1/6 2 and 1/6 waffles left
