Add 12/20 and 98/21
1st number: 12/20, 2nd number: 4 14/21
12/20 + 98/21 is 79/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
12/20 = 12 × 21/20 × 21 = 252/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
98/21 = 98 × 20/21 × 20 = 1960/420 - Add the two like fractions:
252/420 + 1960/420 = 252 + 1960/420 = 2212/420 - 2212/420 simplified gives 79/15
- So, 12/20 + 98/21 = 79/15
In mixed form: 54/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20+98/21 12/40+98/21 12/20+98/42 36/20+98/21 12/60+98/21 12/20+98/63 60/20+98/21 84/20+98/21