Add 50/5 and 70/21
1st number: 10 0/5, 2nd number: 3 7/21
50/5 + 70/21 is 40/3.
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,
50/5 = 50 × 21/5 × 21 = 1050/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
70/21 = 70 × 5/21 × 5 = 350/105 - Add the two like fractions:
1050/105 + 350/105 = 1050 + 350/105 = 1400/105 - 1400/105 simplified gives 40/3
- So, 50/5 + 70/21 = 40/3
In mixed form: 131/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/10+70/21 50/5+70/42 50/15+70/21 50/5+70/63 50/25+70/21 50/35+70/21