Add 30/8 and 28/40
1st number: 3 6/8, 2nd number: 28/40
30/8 + 28/40 is 89/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
30/8 = 30 × 5/8 × 5 = 150/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
28/40 = 28 × 1/40 × 1 = 28/40 - Add the two like fractions:
150/40 + 28/40 = 150 + 28/40 = 178/40 - 178/40 simplified gives 89/20
- So, 30/8 + 28/40 = 89/20
In mixed form: 49/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/8+28/40 30/8+56/40 30/16+28/40 30/8+28/80 90/8+28/40 30/8+84/40 30/24+28/40 30/40+28/40 30/56+28/40