Answer:
100/90 is equivalent
so is 90/81
Explanation:
We know this because 10 x 10=100 and 9 x 10=90 we get 100/90
then 10 x 9= 90 then 9 x 9=81/ so 90/81 is equivalent as well
20/18
Multiply both terms by the same value and you get an equal ratio.
10*10
9*9
100/81 is a ratio equivalent to 10/9
Hope this helps!
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