Solutions by everydaycalculation.com

23 - 45 is -215.

- Find the least common denominator or LCM of the two denominators:

LCM of 3 and 5 is**15**

Next, find the equivalent fraction of both fractional numbers with denominator 15 - For the 1st fraction, since 3 × 5 = 15,

23 = 2 × 53 × 5 = 1015 - Likewise, for the 2nd fraction, since 5 × 3 = 15,

45 = 4 × 35 × 3 = 1215 - Subtract the two like fractions:

1015 - 1215 = 10 - 1215 = -215

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