Subtract 30/27 from 7/70
1st number: 7/70, 2nd number: 1 3/27
7/70 - 30/27 is -91/90.
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,
7/70 = 7 × 27/70 × 27 = 189/1890 - Likewise, for the 2nd fraction, since 27 × 70 = 1890,
30/27 = 30 × 70/27 × 70 = 2100/1890 - Subtract the two like fractions:
189/1890 - 2100/1890 = 189 - 2100/1890 = -1911/1890 - After reducing the fraction, the answer is -91/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/70-30/27 7/70-60/27 7/70-30/54 21/70-30/27 7/70-90/27 7/70-30/81 35/70-30/27 49/70-30/27