Add 60/21 and 20/80
1st number: 2 18/21, 2nd number: 20/80
60/21 + 20/80 is 87/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
60/21 = 60 × 80/21 × 80 = 4800/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
20/80 = 20 × 21/80 × 21 = 420/1680 - Add the two like fractions:
4800/1680 + 420/1680 = 4800 + 420/1680 = 5220/1680 - 5220/1680 simplified gives 87/28
- So, 60/21 + 20/80 = 87/28
In mixed form: 33/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21+40/80 60/42+20/80 60/21+60/80 60/63+20/80