Add 42/81 and 60/72
42/81 + 60/72 is 73/54.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 72 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 81 × 8 = 648,
42/81 = 42 × 8/81 × 8 = 336/648 - Likewise, for the 2nd fraction, since 72 × 9 = 648,
60/72 = 60 × 9/72 × 9 = 540/648 - Add the two like fractions:
336/648 + 540/648 = 336 + 540/648 = 876/648 - 876/648 simplified gives 73/54
- So, 42/81 + 60/72 = 73/54
In mixed form: 119/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/81+60/72