Final answer:
To find the percent increase, calculate the difference between the two amounts and express it as a percentage of the original amount. The percent increase is 50%.
Step-by-step explanation:
To find the percent increase, we need to calculate the difference between the two amounts and express it as a percentage of the original amount.
Step 1: Calculate the difference:
Difference = New Amount - Original Amount
Difference = 39 - 26
Difference = 13 hours
Step 2: Calculate the percent increase:
Percent Increase = (Difference / Original Amount) * 100
Percent Increase = (13 / 26) * 100
Percent Increase = 50%
Therefore, the percent increase in the weekly amount of TV watched by Ryan's family is 50%.