Add 20/48 and 42/81
20/48 + 42/81 is 101/108.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 81 is 1296
Next, find the equivalent fraction of both fractional numbers with denominator 1296 - For the 1st fraction, since 48 × 27 = 1296,
20/48 = 20 × 27/48 × 27 = 540/1296 - Likewise, for the 2nd fraction, since 81 × 16 = 1296,
42/81 = 42 × 16/81 × 16 = 672/1296 - Add the two like fractions:
540/1296 + 672/1296 = 540 + 672/1296 = 1212/1296 - 1212/1296 simplified gives 101/108
- So, 20/48 + 42/81 = 101/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/48+42/81 20/48+84/81 20/96+42/81 60/48+42/81