Add 1/30 and 21/45
1/30 + 21/45 is 1/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
1/30 = 1 × 3/30 × 3 = 3/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
21/45 = 21 × 2/45 × 2 = 42/90 - Add the two like fractions:
3/90 + 42/90 = 3 + 42/90 = 45/90 - 45/90 simplified gives 1/2
- So, 1/30 + 21/45 = 1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/30+21/45 1/30+42/45 1/60+21/45 1/30+21/90 3/30+21/45 1/30+63/45 1/90+21/45 5/30+21/45 7/30+21/45