Add 21/48 and 21/30
21/48 + 21/30 is 91/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 30 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 48 × 5 = 240,
21/48 = 21 × 5/48 × 5 = 105/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
21/30 = 21 × 8/30 × 8 = 168/240 - Add the two like fractions:
105/240 + 168/240 = 105 + 168/240 = 273/240 - 273/240 simplified gives 91/80
- So, 21/48 + 21/30 = 91/80
In mixed form: 111/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/48+21/30 21/48+42/30 21/96+21/30 21/48+21/60 63/48+21/30 21/48+63/30 21/48+21/90