Add 36/5 and 70/21
1st number: 7 1/5, 2nd number: 3 7/21
36/5 + 70/21 is 158/15.
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,
36/5 = 36 × 21/5 × 21 = 756/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
70/21 = 70 × 5/21 × 5 = 350/105 - Add the two like fractions:
756/105 + 350/105 = 756 + 350/105 = 1106/105 - 1106/105 simplified gives 158/15
- So, 36/5 + 70/21 = 158/15
In mixed form: 108/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/5+70/21 36/10+70/21 36/5+70/42 36/15+70/21 36/5+70/63 36/25+70/21 36/35+70/21