Answer:
The local DQ sold 308 sundaes in a month.
Explanation:
The ratio of this is sundaes to blizzards, which is 4 sundaes to 7 blizzards.
The question we're asking is ? : 539.
We know that 4 : 7 is our ratio and the other one is as stated, ? : 539.
539 blizzards divided by 7 is 77.
Now if you multiply 4 by 77 it equals 308.
4 : 7 is equivelent to 308 : 539 (4 x 77 = 308 and 7 x 77 = 539)
So, the sundaes they sold is 308 sundaes.