Subtract 40/70 from 15/27
15/27 - 40/70 is -1/63.
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,
15/27 = 15 × 70/27 × 70 = 1050/1890 - Likewise, for the 2nd fraction, since 70 × 27 = 1890,
40/70 = 40 × 27/70 × 27 = 1080/1890 - Subtract the two like fractions:
1050/1890 - 1080/1890 = 1050 - 1080/1890 = -30/1890 - After reducing the fraction, the answer is -1/63
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