103 = 1000, which, in fractional notation would be 1000/1
597/10
2.7 as an improper fraction is 27/10
8.7 = 87/10
10-3 in standard notation is 0.001
48.9 x 10 to the 3rd power in scientific notation is 48.9 x 103In standard notation: 48,900
2478 and 9/10, which as an improper fraction is 24789/10
8.848*10 to the 3rd notation Well done! But that is not scientific (written) notation.
42.3 is already in its decimal notation but it can be written as 423/10 as an improper fraction.
87/10 IS a mixed fraction so you do not need to do anything to "convert" to a fractional notation.
1,000
113/1000
7.8 = 78/10 which can be simplified if you so wish.