Subtract 12/70 from 63/21
1st number: 3 0/21, 2nd number: 12/70
63/21 - 12/70 is 99/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
63/21 = 63 × 10/21 × 10 = 630/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
12/70 = 12 × 3/70 × 3 = 36/210 - Subtract the two like fractions:
630/210 - 36/210 = 630 - 36/210 = 594/210 - After reducing the fraction, the answer is 99/35
- In mixed form: 229/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/21-24/70 63/42-12/70 63/21-36/70 63/21-60/70 63/21-84/70