Add 84/42 and 63/15
1st number: 2 0/42, 2nd number: 4 3/15
84/42 + 63/15 is 31/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
84/42 = 84 × 5/42 × 5 = 420/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
63/15 = 63 × 14/15 × 14 = 882/210 - Add the two like fractions:
420/210 + 882/210 = 420 + 882/210 = 1302/210 - 1302/210 simplified gives 31/5
- So, 84/42 + 63/15 = 31/5
In mixed form: 61/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42+63/30 84/42+63/45 84/42+63/75