Form the ratio 560/2800 and then mult. the result by 100%:
560
--------- * 100% = 20%
2800
Add the ratios together and divide them by 132. then times the number by the answer you get.
3+3+5=11
132÷11=12
12×3=36
12×3=36
12×5=60
so: 36:36:60
150%. since you already have 6, that's 100%. the extra 3 is half of the 6, meaning that it would be 50%
If we change everything to the same denominator it will look like this. 24/30 and he wants to take 10/30. 24/30 - 10/30 is 14/30 so 14/30 - 10/30 is 4/30. *He can take 2 1/3 pieces*
