Add 42/10 and 90/28
1st number: 4 2/10, 2nd number: 3 6/28
42/10 + 90/28 is 519/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 10 × 14 = 140,
42/10 = 42 × 14/10 × 14 = 588/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
90/28 = 90 × 5/28 × 5 = 450/140 - Add the two like fractions:
588/140 + 450/140 = 588 + 450/140 = 1038/140 - 1038/140 simplified gives 519/70
- So, 42/10 + 90/28 = 519/70
In mixed form: 729/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10+90/28 42/20+90/28 42/10+90/56 42/30+90/28 42/10+90/84 42/50+90/28 42/70+90/28