Subtract 21/70 from 12/27
12/27 - 21/70 is 13/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 70 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 27 × 70 = 1890,
12/27 = 12 × 70/27 × 70 = 840/1890 - Likewise, for the 2nd fraction, since 70 × 27 = 1890,
21/70 = 21 × 27/70 × 27 = 567/1890 - Subtract the two like fractions:
840/1890 - 567/1890 = 840 - 567/1890 = 273/1890 - After reducing the fraction, the answer is 13/90
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