Add 9/10 and 28/42
9/10 + 28/42 is 47/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
9/10 = 9 × 21/10 × 21 = 189/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
28/42 = 28 × 5/42 × 5 = 140/210 - Add the two like fractions:
189/210 + 140/210 = 189 + 140/210 = 329/210 - 329/210 simplified gives 47/30
- So, 9/10 + 28/42 = 47/30
In mixed form: 117/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/10+28/42 9/10+56/42 9/20+28/42 9/10+28/84 27/10+28/42 9/10+84/42 9/30+28/42 45/10+28/42 9/50+28/42 63/10+28/42 9/70+28/42