Add 25/42 and 36/80
25/42 + 36/80 is 439/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
25/42 = 25 × 40/42 × 40 = 1000/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
36/80 = 36 × 21/80 × 21 = 756/1680 - Add the two like fractions:
1000/1680 + 756/1680 = 1000 + 756/1680 = 1756/1680 - 1756/1680 simplified gives 439/420
- So, 25/42 + 36/80 = 439/420
In mixed form: 119/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42+36/80 25/42+72/80 25/84+36/80 75/42+36/80