Add 80/21 and 42/60
1st number: 3 17/21, 2nd number: 42/60
80/21 + 42/60 is 947/210.
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,
80/21 = 80 × 20/21 × 20 = 1600/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
42/60 = 42 × 7/60 × 7 = 294/420 - Add the two like fractions:
1600/420 + 294/420 = 1600 + 294/420 = 1894/420 - 1894/420 simplified gives 947/210
- So, 80/21 + 42/60 = 947/210
In mixed form: 4107/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21+84/60 80/42+42/60 80/63+42/60