Add 4/18 and 40/42
4/18 + 40/42 is 74/63.
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,
4/18 = 4 × 7/18 × 7 = 28/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
40/42 = 40 × 3/42 × 3 = 120/126 - Add the two like fractions:
28/126 + 120/126 = 28 + 120/126 = 148/126 - 148/126 simplified gives 74/63
- So, 4/18 + 40/42 = 74/63
In mixed form: 111/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/18+40/42 4/18+80/42 4/36+40/42 4/18+40/84 12/18+40/42 4/54+40/42 20/18+40/42 4/90+40/42 28/18+40/42