Solutions by everydaycalculation.com

812 - 4570 is 142.

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

LCM of 12 and 70 is**420**

Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 12 × 35 = 420,

812 = 8 × 3512 × 35 = 280420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,

4570 = 45 × 670 × 6 = 270420 - Subtract the two like fractions:

280420 - 270420 = 280 - 270420 = 10420 - After reducing the fraction, the answer is 142

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