Add 14/70 and 80/21
1st number: 14/70, 2nd number: 3 17/21
14/70 + 80/21 is 421/105.
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,
14/70 = 14 × 3/70 × 3 = 42/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
80/21 = 80 × 10/21 × 10 = 800/210 - Add the two like fractions:
42/210 + 800/210 = 42 + 800/210 = 842/210 - 842/210 simplified gives 421/105
- So, 14/70 + 80/21 = 421/105
In mixed form: 41/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/70+80/21 14/70+80/42 42/70+80/21 14/70+80/63 98/70+80/21