Add 21/30 and 48/84
21/30 + 48/84 is 89/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
21/30 = 21 × 14/30 × 14 = 294/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
48/84 = 48 × 5/84 × 5 = 240/420 - Add the two like fractions:
294/420 + 240/420 = 294 + 240/420 = 534/420 - 534/420 simplified gives 89/70
- So, 21/30 + 48/84 = 89/70
In mixed form: 119/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+48/84 21/30+96/84 21/60+48/84 63/30+48/84 21/90+48/84