Add 70/63 and 15/20
1st number: 1 7/63, 2nd number: 15/20
70/63 + 15/20 is 67/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 20 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 63 × 20 = 1260,
70/63 = 70 × 20/63 × 20 = 1400/1260 - Likewise, for the 2nd fraction, since 20 × 63 = 1260,
15/20 = 15 × 63/20 × 63 = 945/1260 - Add the two like fractions:
1400/1260 + 945/1260 = 1400 + 945/1260 = 2345/1260 - 2345/1260 simplified gives 67/36
- So, 70/63 + 15/20 = 67/36
In mixed form: 131/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/63+30/20 70/63+15/40 70/63+45/20 70/63+15/60 70/63+75/20