Notation with a decimal point is called decimal for a reason. Every step after the point is a fraction of 10 more.
0.1 = 1/10
0.01 = 1/100
0.001 = 1/1000 etc.
0.01 = 1/100 so 0.07 = 7/100
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The decimal 0.07 is written as 7/100 in the form of a fraction.7/100
2.769 in fraction = 2769/1000
2.7 as an improper fraction is 27/10
22/3
42.3 is already in its decimal notation but it can be written as 423/10 as an improper fraction.