Add 24/30 and 21/70
24/30 + 21/70 is 11/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
24/30 = 24 × 7/30 × 7 = 168/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
21/70 = 21 × 3/70 × 3 = 63/210 - Add the two like fractions:
168/210 + 63/210 = 168 + 63/210 = 231/210 - 231/210 simplified gives 11/10
- So, 24/30 + 21/70 = 11/10
In mixed form: 11/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/30+21/70 24/30+42/70 24/60+21/70 72/30+21/70 24/30+63/70 24/90+21/70