Add 30/20 and 90/28
1st number: 1 10/20, 2nd number: 3 6/28
30/20 + 90/28 is 33/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
30/20 = 30 × 7/20 × 7 = 210/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
90/28 = 90 × 5/28 × 5 = 450/140 - Add the two like fractions:
210/140 + 450/140 = 210 + 450/140 = 660/140 - 660/140 simplified gives 33/7
- So, 30/20 + 90/28 = 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: 60/20+90/28 30/40+90/28 30/20+90/56 90/20+90/28 30/60+90/28 30/20+90/84