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Forget the zero.

3.6 = 3 and 6/10

-------------------------improper fraction

(10*3+6)/10

= 36/10

-----------

7.9 = 7 and 9/10

-------------------------improper fraction

(10*7+9)/10

= 79/10

--------------------so,

79/10 - 36/10

= 43/10

=========in an improper fraction (4.30 as decimal, or 4.3)

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11y ago

What else can I help you with?