A(blank) is a ratio in which the first term is compared to 100

Percent

Step-by-step explanation: A percent is a ratio of a number to 100 or a ratio that compares a number to 100.

Percents are all around us. If you've ever been to a store, you will often see signs that say stuff like 25% off or 50% off especially around the holidays. These types of percents show you how much of a discount you will be getting.

When you go out to dinner, your parents figure out how much to tip the servers which is also calculated in percentages as well.

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.