Add 21/50 and 54/70
21/50 + 54/70 is 417/350.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 70 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 50 × 7 = 350,
21/50 = 21 × 7/50 × 7 = 147/350 - Likewise, for the 2nd fraction, since 70 × 5 = 350,
54/70 = 54 × 5/70 × 5 = 270/350 - Add the two like fractions:
147/350 + 270/350 = 147 + 270/350 = 417/350 - So, 21/50 + 54/70 = 417/350
In mixed form: 167/350
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/50+54/70 63/50+54/70