Add 63/70 and 15/42
63/70 + 15/42 is 44/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
63/70 = 63 × 3/70 × 3 = 189/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210 - Add the two like fractions:
189/210 + 75/210 = 189 + 75/210 = 264/210 - 264/210 simplified gives 44/35
- So, 63/70 + 15/42 = 44/35
In mixed form: 19/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/70+30/42 63/70+15/84 63/70+45/42 63/70+75/42