Exponential notation, I believe is what you mean.
3x10(0)+7x1/10(1)+5x1/10(2)
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375% = 15/4
write 18.575 in fractional notation
7.2 in fractional notation = 36/5
The fractional notation for 5.15 is 103/20
The fractional notation for 2.21 = 221/100