Add 24/84 and 21/30
24/84 + 21/30 is 69/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
24/84 = 24 × 5/84 × 5 = 120/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
21/30 = 21 × 14/30 × 14 = 294/420 - Add the two like fractions:
120/420 + 294/420 = 120 + 294/420 = 414/420 - 414/420 simplified gives 69/70
- So, 24/84 + 21/30 = 69/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/84+21/30 24/84+42/30 24/84+21/60 72/84+21/30 24/84+63/30 24/84+21/90