Add 1/30 and 21/80
1/30 + 21/80 is 71/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
1/30 = 1 × 8/30 × 8 = 8/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
21/80 = 21 × 3/80 × 3 = 63/240 - Add the two like fractions:
8/240 + 63/240 = 8 + 63/240 = 71/240 - So, 1/30 + 21/80 = 71/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/30+21/80 1/30+42/80 1/60+21/80 3/30+21/80 1/30+63/80 1/90+21/80 5/30+21/80 7/30+21/80