Add 45/21 and 56/8
1st number: 2 3/21, 2nd number: 7 0/8
45/21 + 56/8 is 64/7.
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,
56/8 = 56 × 21/8 × 21 = 1176/168 - Add the two like fractions:
360/168 + 1176/168 = 360 + 1176/168 = 1536/168 - 1536/168 simplified gives 64/7
- So, 45/21 + 56/8 = 64/7
In mixed form: 91/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21+56/8 45/42+56/8 45/21+56/16 45/63+56/8 45/21+56/24 45/21+56/40