Subtract 90/27 from 30/70
1st number: 30/70, 2nd number: 3 9/27
30/70 - 90/27 is -61/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 27 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 70 × 27 = 1890,
30/70 = 30 × 27/70 × 27 = 810/1890 - Likewise, for the 2nd fraction, since 27 × 70 = 1890,
90/27 = 90 × 70/27 × 70 = 6300/1890 - Subtract the two like fractions:
810/1890 - 6300/1890 = 810 - 6300/1890 = -5490/1890 - After reducing the fraction, the answer is -61/21
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