Answer:
= 170 pages per hour
Working Out:
This is a fraction equal to
680 pages ÷ 4 hours
We want a unit rate where
1 is in the denominator,
so we divide top and bottom by 4
680 pages ÷ 4
________________
4 hours ÷ 4
170 pages
_______
hour
= 170 pages per hour
