Add 10/70 and 45/21
1st number: 10/70, 2nd number: 2 3/21
10/70 + 45/21 is 16/7.
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,
10/70 = 10 × 3/70 × 3 = 30/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
45/21 = 45 × 10/21 × 10 = 450/210 - Add the two like fractions:
30/210 + 450/210 = 30 + 450/210 = 480/210 - 480/210 simplified gives 16/7
- So, 10/70 + 45/21 = 16/7
In mixed form: 22/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/70+45/21 10/70+90/21 10/70+45/42 30/70+45/21 10/70+45/63 50/70+45/21