5.21.
To find this, give both numbers decimal points before setting up a subtraction equation as so:
15.00 - 9.79
Then proceed to solve to get the final answer of 5.21.
Hope this helps!
Depends on where you are in the math book but this would be the most simple way.
n= number
sqar(-1) = i
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❖ You can write 0.8 as 8/10 and 80% as 80/100.
(8/10 and 8/100 are equivalent.)
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The answer to that is y = -6