Subtract 10/42 from 45/15
1st number: 3 0/15, 2nd number: 10/42
45/15 - 10/42 is 58/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
45/15 = 45 × 14/15 × 14 = 630/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
10/42 = 10 × 5/42 × 5 = 50/210 - Subtract the two like fractions:
630/210 - 50/210 = 630 - 50/210 = 580/210 - After reducing the fraction, the answer is 58/21
- In mixed form: 216/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15-10/42 45/15-20/42 45/30-10/42 45/15-10/84 45/15-30/42 45/15-50/42 45/75-10/42 45/15-70/42