Subtract 70/30 from 42/8
1st number: 5 2/8, 2nd number: 2 10/30
42/8 - 70/30 is 35/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
42/8 = 42 × 15/8 × 15 = 630/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
70/30 = 70 × 4/30 × 4 = 280/120 - Subtract the two like fractions:
630/120 - 280/120 = 630 - 280/120 = 350/120 - After reducing the fraction, the answer is 35/12
- In mixed form: 211/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/8-70/30 42/16-70/30 42/8-70/60 42/24-70/30 42/8-70/90 42/40-70/30 42/56-70/30