Add 56/84 and 42/80
56/84 + 42/80 is 143/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 84 × 20 = 1680,
56/84 = 56 × 20/84 × 20 = 1120/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
42/80 = 42 × 21/80 × 21 = 882/1680 - Add the two like fractions:
1120/1680 + 882/1680 = 1120 + 882/1680 = 2002/1680 - 2002/1680 simplified gives 143/120
- So, 56/84 + 42/80 = 143/120
In mixed form: 123/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/84+84/80