Subtract 42/7 from 45/15
1st number: 3 0/15, 2nd number: 6 0/7
45/15 - 42/7 is -3/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 7 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
45/15 = 45 × 7/15 × 7 = 315/105 - Likewise, for the 2nd fraction, since 7 × 15 = 105,
42/7 = 42 × 15/7 × 15 = 630/105 - Subtract the two like fractions:
315/105 - 630/105 = 315 - 630/105 = -315/105 - After reducing the fraction, the answer is -3/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15-42/7 45/15-84/7 45/30-42/7 45/15-42/14 45/15-42/21 45/75-42/7 45/15-42/35 45/15-42/49