Add 45/21 and 4/80
1st number: 2 3/21, 2nd number: 4/80
45/21 + 4/80 is 307/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
45/21 = 45 × 80/21 × 80 = 3600/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
4/80 = 4 × 21/80 × 21 = 84/1680 - Add the two like fractions:
3600/1680 + 84/1680 = 3600 + 84/1680 = 3684/1680 - 3684/1680 simplified gives 307/140
- So, 45/21 + 4/80 = 307/140
In mixed form: 227/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21+4/80 45/21+8/80 45/42+4/80 45/21+12/80 45/63+4/80 45/21+20/80 45/21+28/80