Add 30/28 and 18/40
1st number: 1 2/28, 2nd number: 18/40
30/28 + 18/40 is 213/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
30/28 = 30 × 10/28 × 10 = 300/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
18/40 = 18 × 7/40 × 7 = 126/280 - Add the two like fractions:
300/280 + 126/280 = 300 + 126/280 = 426/280 - 426/280 simplified gives 213/140
- So, 30/28 + 18/40 = 213/140
In mixed form: 173/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/28+18/40 30/28+36/40 30/56+18/40 30/28+18/80 90/28+18/40 30/28+54/40 30/84+18/40 30/28+90/40