Add 28/10 and 42/30
1st number: 2 8/10, 2nd number: 1 12/30
28/10 + 42/30 is 21/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 10 × 3 = 30,
28/10 = 28 × 3/10 × 3 = 84/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
42/30 = 42 × 1/30 × 1 = 42/30 - Add the two like fractions:
84/30 + 42/30 = 84 + 42/30 = 126/30 - 126/30 simplified gives 21/5
- So, 28/10 + 42/30 = 21/5
In mixed form: 41/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/10+42/30 28/10+84/30 28/20+42/30 28/10+42/60 84/10+42/30 28/30+42/30 28/10+42/90 28/50+42/30 28/70+42/30