Add 60/4 and 30/21
1st number: 15 0/4, 2nd number: 1 9/21
60/4 + 30/21 is 115/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
60/4 = 60 × 21/4 × 21 = 1260/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
30/21 = 30 × 4/21 × 4 = 120/84 - Add the two like fractions:
1260/84 + 120/84 = 1260 + 120/84 = 1380/84 - 1380/84 simplified gives 115/7
- So, 60/4 + 30/21 = 115/7
In mixed form: 163/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/4+60/21 60/8+30/21 60/4+30/42 60/4+90/21 60/12+30/21 60/4+30/63 60/20+30/21 60/28+30/21