To find out how many minutes Jason will read by the end of the month, we need to calculate one and a half times the amount he read last week.
Last week, Jason read 28.5 minutes. We need to calculate:
1.5 times 28.5 minutes.
This can be calculated as follows:
\[ 1.5 \times 28.5 = 42.75 \]
Therefore, by the end of the month, Jason will read 42.75 minutes.