Add 5/7 and 45/20
1st number: 5/7, 2nd number: 2 5/20
5/7 + 45/20 is 83/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
5/7 = 5 × 20/7 × 20 = 100/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
45/20 = 45 × 7/20 × 7 = 315/140 - Add the two like fractions:
100/140 + 315/140 = 100 + 315/140 = 415/140 - 415/140 simplified gives 83/28
- So, 5/7 + 45/20 = 83/28
In mixed form: 227/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/7+45/20 5/7+90/20 5/14+45/20 5/7+45/40 15/7+45/20 5/21+45/20 5/7+45/60 25/7+45/20 5/35+45/20 35/7+45/20 5/49+45/20