Subtract 42/70 from 15/4
1st number: 3 3/4, 2nd number: 42/70
15/4 - 42/70 is 63/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 4 × 35 = 140,
15/4 = 15 × 35/4 × 35 = 525/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
42/70 = 42 × 2/70 × 2 = 84/140 - Subtract the two like fractions:
525/140 - 84/140 = 525 - 84/140 = 441/140 - After reducing the fraction, the answer is 63/20
- In mixed form: 33/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/4-42/70 15/4-84/70 15/8-42/70 45/4-42/70 15/12-42/70 75/4-42/70 15/20-42/70 15/28-42/70