Add 20/18 and 40/42
1st number: 1 2/18, 2nd number: 40/42
20/18 + 40/42 is 130/63.
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,
20/18 = 20 × 7/18 × 7 = 140/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
40/42 = 40 × 3/42 × 3 = 120/126 - Add the two like fractions:
140/126 + 120/126 = 140 + 120/126 = 260/126 - 260/126 simplified gives 130/63
- So, 20/18 + 40/42 = 130/63
In mixed form: 24/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18+40/42 20/18+80/42 20/36+40/42 20/18+40/84 60/18+40/42 20/54+40/42 20/90+40/42