Add 12/21 and 75/8
1st number: 12/21, 2nd number: 9 3/8
12/21 + 75/8 is 557/56.
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,
12/21 = 12 × 8/21 × 8 = 96/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
75/8 = 75 × 21/8 × 21 = 1575/168 - Add the two like fractions:
96/168 + 1575/168 = 96 + 1575/168 = 1671/168 - 1671/168 simplified gives 557/56
- So, 12/21 + 75/8 = 557/56
In mixed form: 953/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+75/8 12/42+75/8 12/21+75/16 36/21+75/8 12/63+75/8 12/21+75/24 60/21+75/8 12/21+75/40 84/21+75/8 12/21+75/56