Add 42/81 and 12/28
42/81 + 12/28 is 179/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 28 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 81 × 28 = 2268,
42/81 = 42 × 28/81 × 28 = 1176/2268 - Likewise, for the 2nd fraction, since 28 × 81 = 2268,
12/28 = 12 × 81/28 × 81 = 972/2268 - Add the two like fractions:
1176/2268 + 972/2268 = 1176 + 972/2268 = 2148/2268 - 2148/2268 simplified gives 179/189
- So, 42/81 + 12/28 = 179/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/81+12/28 42/81+24/28 42/81+12/56 42/81+36/28 42/81+12/84 42/81+60/28 42/81+84/28