Find a rational number that is between 7.7 and 7.9. explain why it is rational.

The average between any two rational numbers is also rational.
(7.7 + 7.9)/2 = 7.8
7.8 is rational because it can be written as a fraction with integer numerator and denominator (39/5) and it is also a terminating decimal.

7.8

Step-by-step explanation:

One rational number is 7.8

It is rational because it has terminating decimal expansion

It’s about 352 percent.

Step-by-step explanation:

60/17=3.5294. This translates to 352.94 percent, or 353%. When you multiply 17 by 300%, you end up with 60.01, so it is as close as you can get.