Add 16/8 and 45/21
1st number: 2 0/8, 2nd number: 2 3/21
16/8 + 45/21 is 29/7.
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,
16/8 = 16 × 21/8 × 21 = 336/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
45/21 = 45 × 8/21 × 8 = 360/168 - Add the two like fractions:
336/168 + 360/168 = 336 + 360/168 = 696/168 - 696/168 simplified gives 29/7
- So, 16/8 + 45/21 = 29/7
In mixed form: 41/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/8+45/21 16/8+90/21 16/8+45/42 48/8+45/21 16/24+45/21 16/8+45/63 80/8+45/21 16/40+45/21 16/56+45/21