Add 80/18 and 40/42
1st number: 4 8/18, 2nd number: 40/42
80/18 + 40/42 is 340/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
80/18 = 80 × 7/18 × 7 = 560/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
40/42 = 40 × 3/42 × 3 = 120/126 - Add the two like fractions:
560/126 + 120/126 = 560 + 120/126 = 680/126 - 680/126 simplified gives 340/63
- So, 80/18 + 40/42 = 340/63
In mixed form: 525/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/18+80/42 80/36+40/42 80/18+40/84 80/54+40/42 80/90+40/42