Add 20/5 and 45/7
1st number: 4 0/5, 2nd number: 6 3/7
20/5 + 45/7 is 73/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 7 is 35
Next, find the equivalent fraction of both fractional numbers with denominator 35 - For the 1st fraction, since 5 × 7 = 35,
20/5 = 20 × 7/5 × 7 = 140/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
45/7 = 45 × 5/7 × 5 = 225/35 - Add the two like fractions:
140/35 + 225/35 = 140 + 225/35 = 365/35 - 365/35 simplified gives 73/7
- So, 20/5 + 45/7 = 73/7
In mixed form: 103/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5+45/7 20/5+90/7 20/10+45/7 20/5+45/14 60/5+45/7 20/15+45/7 20/5+45/21 20/25+45/7 20/5+45/35 20/35+45/7 20/5+45/49