The fractions [tex] \frac{1}{8}, \frac{1}{10}, and \frac{1}{3} [/tex] have a least common denomenator of 120. So their equilvelnt fractions are in order, [tex] \frac{15}{120}, \frac{12}{120}, and \frac{40}{120}.[/tex] In this format it is easy to see that 15 is greater than 12 but less than 40.
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