Solutions by everydaycalculation.com

1^{st} number: 3/45, 2^{nd} number: 1 6/12

345 - 1812 is -4330.

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

LCM of 45 and 12 is**180**

Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,

345 = 3 × 445 × 4 = 12180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,

1812 = 18 × 1512 × 15 = 270180 - Subtract the two like fractions:

12180 - 270180 = 12 - 270180 = -258180 - After reducing the fraction, the answer is -4330

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