Add 70/5 and 42/21
1st number: 14 0/5, 2nd number: 2 0/21
70/5 + 42/21 is 16/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
70/5 = 70 × 21/5 × 21 = 1470/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
42/21 = 42 × 5/21 × 5 = 210/105 - Add the two like fractions:
1470/105 + 210/105 = 1470 + 210/105 = 1680/105 - 1680/105 simplified gives 16/1
- So, 70/5 + 42/21 = 16/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/5+84/21 70/10+42/21 70/15+42/21 70/5+42/63 70/25+42/21 70/35+42/21