Add 18/15 and 25/80
1st number: 1 3/15, 2nd number: 25/80
18/15 + 25/80 is 121/80.
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,
18/15 = 18 × 16/15 × 16 = 288/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
25/80 = 25 × 3/80 × 3 = 75/240 - Add the two like fractions:
288/240 + 75/240 = 288 + 75/240 = 363/240 - 363/240 simplified gives 121/80
- So, 18/15 + 25/80 = 121/80
In mixed form: 141/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15+25/80 18/15+50/80 18/30+25/80 54/15+25/80 18/15+75/80 18/45+25/80 90/15+25/80 18/75+25/80