Using the conversion of a mixed fraction to decimal, it is found that Swamee used 0.75 inks of cartridge more than Luigi.
A mixed fraction is represented by:
a b/c.
In which:
Hence, as a decimal, the fraction is given by:
a + (b/c).
Hence the amounts of cartridges used by each are:
The difference is given by:
2.5 - 1.75 = 0.75 inks.
Swamee used 0.75 inks of cartridge more than Luigi.
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