Subtract 63/70 from 12/27
12/27 - 63/70 is -41/90.
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,
63/70 = 63 × 27/70 × 27 = 1701/1890 - Subtract the two like fractions:
840/1890 - 1701/1890 = 840 - 1701/1890 = -861/1890 - After reducing the fraction, the answer is -41/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/27-63/70 12/54-63/70 36/27-63/70 12/81-63/70 60/27-63/70 84/27-63/70