Add 3/8 and 4/21
3/8 + 4/21 is 95/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
3/8 = 3 × 21/8 × 21 = 63/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
4/21 = 4 × 8/21 × 8 = 32/168 - Add the two like fractions:
63/168 + 32/168 = 63 + 32/168 = 95/168 - So, 3/8 + 4/21 = 95/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/8+4/21 3/8+8/21 3/16+4/21 3/8+4/42 9/8+4/21 3/8+12/21 3/24+4/21 3/8+4/63 15/8+4/21 3/8+20/21 3/40+4/21 21/8+4/21 3/8+28/21 3/56+4/21