Since jans punch is 2 1/2 gallons in all. You see how many times 2 1/2 goes into ten which is 4 times. Next you multiply 4 times 2 to see how many of the gallons are orange juice which the answer is 8. So Jan used 8 gallons of orange juice in all. Next we do the same for Matt. So his numbers easy you add 3 and 2 to find the total of gallons of the recipe which makes 5 and then see how many times five goes into 10 which is only 2 times. Then we find how many gallons of that is orange juice by multiply 3x2=6 so Matt used 6 gallons of orange juice. Next we minus there totals which is 8-6=2. So Jan used 2 more gallons of orange juice then Matt.
Here it is in number form with no explanation. Jan: 2+ 1/2=2 1/2 then 10 divided by 2 1/2=4 next 4x2=8 so the answer is 8 gallons of orange juice. Matt:3+2=5 10 divided by 5=2 next 2x3=6 so the answer is 6. To find the final answer you 8-6=2 so Jan used 2 more gallons of orange juice.