Add 81/30 and 20/8
1st number: 2 21/30, 2nd number: 2 4/8
81/30 + 20/8 is 26/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
81/30 = 81 × 4/30 × 4 = 324/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
20/8 = 20 × 15/8 × 15 = 300/120 - Add the two like fractions:
324/120 + 300/120 = 324 + 300/120 = 624/120 - 624/120 simplified gives 26/5
- So, 81/30 + 20/8 = 26/5
In mixed form: 51/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30+40/8 81/60+20/8 81/30+20/16 81/30+60/8 81/90+20/8 81/30+20/24 81/30+20/40 81/30+20/56