Add 30/21 and 45/8
1st number: 1 9/21, 2nd number: 5 5/8
30/21 + 45/8 is 395/56.
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,
30/21 = 30 × 8/21 × 8 = 240/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
45/8 = 45 × 21/8 × 21 = 945/168 - Add the two like fractions:
240/168 + 945/168 = 240 + 945/168 = 1185/168 - 1185/168 simplified gives 395/56
- So, 30/21 + 45/8 = 395/56
In mixed form: 73/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21+45/8 30/21+90/8 30/42+45/8 30/21+45/16 90/21+45/8 30/63+45/8 30/21+45/24 30/21+45/40 30/21+45/56