Subtract 21/70 from 8/54
8/54 - 21/70 is -41/270.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 70 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 54 × 35 = 1890,
8/54 = 8 × 35/54 × 35 = 280/1890 - Likewise, for the 2nd fraction, since 70 × 27 = 1890,
21/70 = 21 × 27/70 × 27 = 567/1890 - Subtract the two like fractions:
280/1890 - 567/1890 = 280 - 567/1890 = -287/1890 - After reducing the fraction, the answer is -41/270
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/54-21/70 8/54-42/70 24/54-21/70 8/54-63/70 40/54-21/70 56/54-21/70