Paige mows 1/6 acre in 1/4 hour
we need to find out how many acres she can mow in 1 hour
1/4 hour is when 1 hour is divided into 4 equal parts
within 1/4 hour she mows 1/6 acre
so to find how much she will mow in 1 hour we have to multiply 1/6 acres by 4
so 1/4 hour she mows - 1/6 acre
then 1 hour she mows -

she mows 2/3 acre in 1 hour