720 = 9 x 80
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40x2=80
80
Oh, what a happy little question! Let's think about it together. If we divide 80 by 9, we find that 9 goes into 80 about 8 times with a remainder of 8. Isn't that just a lovely little math problem to solve?
10*8/9 = 80/9 = 88/9
725 ÷ 9 = 80 with remainder 5 or 80.5556
8 with remainder 8.