Add 60/30 and 70/21
1st number: 2 0/30, 2nd number: 3 7/21
60/30 + 70/21 is 16/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
60/30 = 60 × 7/30 × 7 = 420/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
70/21 = 70 × 10/21 × 10 = 700/210 - Add the two like fractions:
420/210 + 700/210 = 420 + 700/210 = 1120/210 - 1120/210 simplified gives 16/3
- So, 60/30 + 70/21 = 16/3
In mixed form: 51/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/30+70/42 60/90+70/21 60/30+70/63