Subtract 70/15 from 42/2
1st number: 21 0/2, 2nd number: 4 10/15
42/2 - 70/15 is 49/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 2 × 15 = 30,
42/2 = 42 × 15/2 × 15 = 630/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
70/15 = 70 × 2/15 × 2 = 140/30 - Subtract the two like fractions:
630/30 - 140/30 = 630 - 140/30 = 490/30 - After reducing the fraction, the answer is 49/3
- In mixed form: 161/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/2-70/15 42/4-70/15 42/2-70/30 42/6-70/15 42/2-70/45 42/10-70/15 42/2-70/75 42/14-70/15