Add 28/30 and 16/21
28/30 + 16/21 is 178/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
28/30 = 28 × 7/30 × 7 = 196/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
16/21 = 16 × 10/21 × 10 = 160/210 - Add the two like fractions:
196/210 + 160/210 = 196 + 160/210 = 356/210 - 356/210 simplified gives 178/105
- So, 28/30 + 16/21 = 178/105
In mixed form: 173/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30+16/21 28/30+32/21 28/60+16/21 28/30+16/42 84/30+16/21 28/30+48/21 28/90+16/21 28/30+16/63 28/30+80/21