Add 45/21 and 5/8
1st number: 2 3/21, 2nd number: 5/8
45/21 + 5/8 is 155/56.
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,
45/21 = 45 × 8/21 × 8 = 360/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
5/8 = 5 × 21/8 × 21 = 105/168 - Add the two like fractions:
360/168 + 105/168 = 360 + 105/168 = 465/168 - 465/168 simplified gives 155/56
- So, 45/21 + 5/8 = 155/56
In mixed form: 243/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21+5/8 45/21+10/8 45/42+5/8 45/21+5/16 45/21+15/8 45/63+5/8 45/21+5/24 45/21+25/8 45/21+5/40 45/21+35/8 45/21+5/56