Subtract 25/27 from 42/30
1st number: 1 12/30, 2nd number: 25/27
42/30 - 25/27 is 64/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 30 × 9 = 270,
42/30 = 42 × 9/30 × 9 = 378/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
25/27 = 25 × 10/27 × 10 = 250/270 - Subtract the two like fractions:
378/270 - 250/270 = 378 - 250/270 = 128/270 - After reducing the fraction, the answer is 64/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30-25/27 42/30-50/27 42/60-25/27 42/30-25/54 42/30-75/27 42/90-25/27 42/30-25/81