To determine how many pages Damian can read in 3 hours, we can start by observing that he reads 21 pages in 1 hour.
We set up the relationship as follows:
[tex]\[ \frac{21 \text { pages}}{1 \text { hour}} = \frac{\text { pages}}{3 \text { hours}} \][/tex]
To go from 1 hour to 3 hours, you multiply the time by 3. Thus, we need to multiply the number of pages read in 1 hour by 3:
[tex]\[ 21 \text { pages/hour} \times 3 \text { hours} = 63 \text { pages} \][/tex]
Therefore, Damian can read 63 pages in 3 hours.
