Add 4/72 and 40/42
4/72 + 40/42 is 127/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 42 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
4/72 = 4 × 7/72 × 7 = 28/504 - Likewise, for the 2nd fraction, since 42 × 12 = 504,
40/42 = 40 × 12/42 × 12 = 480/504 - Add the two like fractions:
28/504 + 480/504 = 28 + 480/504 = 508/504 - 508/504 simplified gives 127/126
- So, 4/72 + 40/42 = 127/126
In mixed form: 11/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/72+40/42 4/72+80/42 4/72+40/84 12/72+40/42 20/72+40/42 28/72+40/42