Add 21/72 and 98/16
1st number: 21/72, 2nd number: 6 2/16
21/72 + 98/16 is 77/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 16 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 72 × 2 = 144,
21/72 = 21 × 2/72 × 2 = 42/144 - Likewise, for the 2nd fraction, since 16 × 9 = 144,
98/16 = 98 × 9/16 × 9 = 882/144 - Add the two like fractions:
42/144 + 882/144 = 42 + 882/144 = 924/144 - 924/144 simplified gives 77/12
- So, 21/72 + 98/16 = 77/12
In mixed form: 65/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/72+98/16 21/72+98/32 63/72+98/16 21/72+98/48 21/72+98/80