Add 81/30 and 4/10
1st number: 2 21/30, 2nd number: 4/10
81/30 + 4/10 is 31/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 10 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
81/30 = 81 × 1/30 × 1 = 81/30 - Likewise, for the 2nd fraction, since 10 × 3 = 30,
4/10 = 4 × 3/10 × 3 = 12/30 - Add the two like fractions:
81/30 + 12/30 = 81 + 12/30 = 93/30 - 93/30 simplified gives 31/10
- So, 81/30 + 4/10 = 31/10
In mixed form: 31/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30+8/10 81/60+4/10 81/30+4/20 81/30+12/10 81/90+4/10 81/30+4/30 81/30+20/10 81/30+4/50 81/30+28/10 81/30+4/70