Add 70/21 and 50/30
1st number: 3 7/21, 2nd number: 1 20/30
70/21 + 50/30 is 5/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
70/21 = 70 × 10/21 × 10 = 700/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
50/30 = 50 × 7/30 × 7 = 350/210 - Add the two like fractions:
700/210 + 350/210 = 700 + 350/210 = 1050/210 - 1050/210 simplified gives 5/1
- So, 70/21 + 50/30 = 5/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42+50/30 70/21+50/60 70/63+50/30 70/21+50/90