Add 36/42 and 63/81
36/42 + 63/81 is 103/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 81 is 1134
Next, find the equivalent fraction of both fractional numbers with denominator 1134 - For the 1st fraction, since 42 × 27 = 1134,
36/42 = 36 × 27/42 × 27 = 972/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
63/81 = 63 × 14/81 × 14 = 882/1134 - Add the two like fractions:
972/1134 + 882/1134 = 972 + 882/1134 = 1854/1134 - 1854/1134 simplified gives 103/63
- So, 36/42 + 63/81 = 103/63
In mixed form: 140/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42+63/81 36/84+63/81