Add 42/63 and 28/60
42/63 + 28/60 is 17/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 60 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 63 × 20 = 1260,
42/63 = 42 × 20/63 × 20 = 840/1260 - Likewise, for the 2nd fraction, since 60 × 21 = 1260,
28/60 = 28 × 21/60 × 21 = 588/1260 - Add the two like fractions:
840/1260 + 588/1260 = 840 + 588/1260 = 1428/1260 - 1428/1260 simplified gives 17/15
- So, 42/63 + 28/60 = 17/15
In mixed form: 12/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63+28/60 42/63+56/60 42/63+84/60