Add 15/21 and 16/60
15/21 + 16/60 is 103/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
15/21 = 15 × 20/21 × 20 = 300/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
16/60 = 16 × 7/60 × 7 = 112/420 - Add the two like fractions:
300/420 + 112/420 = 300 + 112/420 = 412/420 - 412/420 simplified gives 103/105
- So, 15/21 + 16/60 = 103/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21+16/60 15/21+32/60 15/42+16/60 45/21+16/60 15/21+48/60 15/63+16/60 75/21+16/60 15/21+80/60