Add 42/15 and 70/63
1st number: 2 12/15, 2nd number: 1 7/63
42/15 + 70/63 is 176/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 15 × 21 = 315,
42/15 = 42 × 21/15 × 21 = 882/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
70/63 = 70 × 5/63 × 5 = 350/315 - Add the two like fractions:
882/315 + 350/315 = 882 + 350/315 = 1232/315 - 1232/315 simplified gives 176/45
- So, 42/15 + 70/63 = 176/45
In mixed form: 341/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15+70/63 42/30+70/63 42/45+70/63 42/75+70/63