Subtract 3/70 from 90/30
1st number: 3 0/30, 2nd number: 3/70
90/30 - 3/70 is 207/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
90/30 = 90 × 7/30 × 7 = 630/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
3/70 = 3 × 3/70 × 3 = 9/210 - Subtract the two like fractions:
630/210 - 9/210 = 630 - 9/210 = 621/210 - After reducing the fraction, the answer is 207/70
- In mixed form: 267/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30-6/70 90/60-3/70 90/30-9/70 90/30-15/70 90/30-21/70