Add 21/70 and 20/54
21/70 + 20/54 is 181/270.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 54 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 70 × 27 = 1890,
21/70 = 21 × 27/70 × 27 = 567/1890 - Likewise, for the 2nd fraction, since 54 × 35 = 1890,
20/54 = 20 × 35/54 × 35 = 700/1890 - Add the two like fractions:
567/1890 + 700/1890 = 567 + 700/1890 = 1267/1890 - 1267/1890 simplified gives 181/270
- So, 21/70 + 20/54 = 181/270
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70+20/54 21/70+40/54 63/70+20/54 21/70+60/54