Add 12/8 and 90/5
1st number: 1 4/8, 2nd number: 18 0/5
12/8 + 90/5 is 39/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 5 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
12/8 = 12 × 5/8 × 5 = 60/40 - Likewise, for the 2nd fraction, since 5 × 8 = 40,
90/5 = 90 × 8/5 × 8 = 720/40 - Add the two like fractions:
60/40 + 720/40 = 60 + 720/40 = 780/40 - 780/40 simplified gives 39/2
- So, 12/8 + 90/5 = 39/2
In mixed form: 191/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/8+90/5 12/16+90/5 12/8+90/10 36/8+90/5 12/24+90/5 12/8+90/15 60/8+90/5 12/40+90/5 12/8+90/25 84/8+90/5 12/56+90/5 12/8+90/35