Add 81/15 and 30/80
1st number: 5 6/15, 2nd number: 30/80
81/15 + 30/80 is 231/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
81/15 = 81 × 16/15 × 16 = 1296/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
30/80 = 30 × 3/80 × 3 = 90/240 - Add the two like fractions:
1296/240 + 90/240 = 1296 + 90/240 = 1386/240 - 1386/240 simplified gives 231/40
- So, 81/15 + 30/80 = 231/40
In mixed form: 531/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/15+60/80 81/30+30/80 81/15+90/80 81/45+30/80 81/75+30/80