Add 30/8 and 90/20
1st number: 3 6/8, 2nd number: 4 10/20
30/8 + 90/20 is 33/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 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 20 × 2 = 40,
90/20 = 90 × 2/20 × 2 = 180/40 - Add the two like fractions:
150/40 + 180/40 = 150 + 180/40 = 330/40 - 330/40 simplified gives 33/4
- So, 30/8 + 90/20 = 33/4
In mixed form: 81/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/8+90/20 30/16+90/20 30/8+90/40 90/8+90/20 30/24+90/20 30/8+90/60 30/40+90/20 30/56+90/20