Answer :

Both 81 and 90 are easily divisible by 9:

81 ÷ 9 = 9
90 ÷ 9 = 10

So, [tex]\frac{81}{90} = \frac{9}{10}[/tex]

9/10 is the simplest form of 81/90.
Steps:
1. Since 9 is 81 and 90 greatest common factor, you divide both the numerator and denominator by 9
81 divided by 9 equals 9
90 divided by 9 is 10
2. 9/10 can't be simplified
3. Your answer is
9/10

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