Add 98/15 and 21/54
1st number: 6 8/15, 2nd number: 21/54
98/15 + 21/54 is 623/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 15 × 18 = 270,
98/15 = 98 × 18/15 × 18 = 1764/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
21/54 = 21 × 5/54 × 5 = 105/270 - Add the two like fractions:
1764/270 + 105/270 = 1764 + 105/270 = 1869/270 - 1869/270 simplified gives 623/90
- So, 98/15 + 21/54 = 623/90
In mixed form: 683/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/15+42/54 98/30+21/54 98/15+63/54 98/45+21/54 98/75+21/54