Add 28/21 and 75/8
1st number: 1 7/21, 2nd number: 9 3/8
28/21 + 75/8 is 257/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
28/21 = 28 × 8/21 × 8 = 224/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
75/8 = 75 × 21/8 × 21 = 1575/168 - Add the two like fractions:
224/168 + 1575/168 = 224 + 1575/168 = 1799/168 - 1799/168 simplified gives 257/24
- So, 28/21 + 75/8 = 257/24
In mixed form: 1017/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+75/8 28/42+75/8 28/21+75/16 84/21+75/8 28/63+75/8 28/21+75/24 28/21+75/40 28/21+75/56