Add 30/18 and 4/42
1st number: 1 12/18, 2nd number: 4/42
30/18 + 4/42 is 37/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
30/18 = 30 × 7/18 × 7 = 210/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
4/42 = 4 × 3/42 × 3 = 12/126 - Add the two like fractions:
210/126 + 12/126 = 210 + 12/126 = 222/126 - 222/126 simplified gives 37/21
- So, 30/18 + 4/42 = 37/21
In mixed form: 116/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/18+4/42 30/18+8/42 30/36+4/42 30/18+4/84 90/18+4/42 30/18+12/42 30/54+4/42 30/18+20/42 30/90+4/42 30/18+28/42