Add 3/42 and 45/81
3/42 + 45/81 is 79/126.
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,
3/42 = 3 × 27/42 × 27 = 81/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
45/81 = 45 × 14/81 × 14 = 630/1134 - Add the two like fractions:
81/1134 + 630/1134 = 81 + 630/1134 = 711/1134 - 711/1134 simplified gives 79/126
- So, 3/42 + 45/81 = 79/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42+45/81 3/42+90/81 3/84+45/81 9/42+45/81 15/42+45/81 21/42+45/81