Add 12/4 and 72/42
1st number: 3 0/4, 2nd number: 1 30/42
12/4 + 72/42 is 33/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
12/4 = 12 × 21/4 × 21 = 252/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
72/42 = 72 × 2/42 × 2 = 144/84 - Add the two like fractions:
252/84 + 144/84 = 252 + 144/84 = 396/84 - 396/84 simplified gives 33/7
- So, 12/4 + 72/42 = 33/7
In mixed form: 45/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/4+72/42 12/8+72/42 12/4+72/84 36/4+72/42 60/4+72/42 12/20+72/42 84/4+72/42 12/28+72/42