Subtract 15/45 from 42/35
1st number: 1 7/35, 2nd number: 15/45
42/35 - 15/45 is 13/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 35 × 9 = 315,
42/35 = 42 × 9/35 × 9 = 378/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
15/45 = 15 × 7/45 × 7 = 105/315 - Subtract the two like fractions:
378/315 - 105/315 = 378 - 105/315 = 273/315 - After reducing the fraction, the answer is 13/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/35-15/45 42/35-30/45 42/70-15/45 42/35-15/90 42/35-75/45