Subtract 12/70 from 84/63
1st number: 1 21/63, 2nd number: 12/70
84/63 - 12/70 is 122/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
84/63 = 84 × 10/63 × 10 = 840/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
12/70 = 12 × 9/70 × 9 = 108/630 - Subtract the two like fractions:
840/630 - 108/630 = 840 - 108/630 = 732/630 - After reducing the fraction, the answer is 122/105
- In mixed form: 117/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63-24/70 84/63-36/70 84/63-60/70 84/63-84/70