Final answer:
To find the percent of increase in temperature, subtract the initial temperature from the final temperature. Divide the difference by the initial temperature and multiply by 100 to get the percent of increase. The percent of increase in the temperature of the mixture is approximately 26.93%.
Step-by-step explanation:
To find the percent of increase in temperature, we first need to calculate the difference between the final and initial temperatures. The final temperature is 15 3/5°F and the initial temperature is 12 1/4°F. Subtracting these two temperatures, we get 3 3/10°F.
Next, we divide the difference by the initial temperature and multiply by 100 to get the percent of increase. So, (3 3/10 / 12 1/4) * 100 = (33/10 / 49/4) * 100. We can simplify this fraction to (33/10 * 4/49) * 100 = 132/490 * 100 = 26.93%.
Therefore, the percent of increase in the temperature of the mixture is approximately 26.93%.