Add 35/70 and 8/21
35/70 + 8/21 is 37/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
35/70 = 35 × 3/70 × 3 = 105/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
8/21 = 8 × 10/21 × 10 = 80/210 - Add the two like fractions:
105/210 + 80/210 = 105 + 80/210 = 185/210 - 185/210 simplified gives 37/42
- So, 35/70 + 8/21 = 37/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 35/70+16/21 35/70+8/42 35/70+24/21 35/70+8/63 35/70+40/21 35/70+56/21