Add 15/21 and 4/70
15/21 + 4/70 is 27/35.
Steps for adding 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,
15/21 = 15 × 10/21 × 10 = 150/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
4/70 = 4 × 3/70 × 3 = 12/210 - Add the two like fractions:
150/210 + 12/210 = 150 + 12/210 = 162/210 - 162/210 simplified gives 27/35
- So, 15/21 + 4/70 = 27/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21+4/70 15/21+8/70 15/42+4/70 45/21+4/70 15/21+12/70 15/63+4/70 75/21+4/70 15/21+20/70 15/21+28/70