Subtract 21/27 from 42/10
1st number: 4 2/10, 2nd number: 21/27
42/10 - 21/27 is 154/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 10 × 27 = 270,
42/10 = 42 × 27/10 × 27 = 1134/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
21/27 = 21 × 10/27 × 10 = 210/270 - Subtract the two like fractions:
1134/270 - 210/270 = 1134 - 210/270 = 924/270 - After reducing the fraction, the answer is 154/45
- In mixed form: 319/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10-21/27 42/10-42/27 42/20-21/27 42/10-21/54 42/10-63/27 42/30-21/27 42/10-21/81 42/50-21/27 42/70-21/27