Add 21/30 and 5/54
21/30 + 5/54 is 107/135.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 30 × 9 = 270,
21/30 = 21 × 9/30 × 9 = 189/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
5/54 = 5 × 5/54 × 5 = 25/270 - Add the two like fractions:
189/270 + 25/270 = 189 + 25/270 = 214/270 - 214/270 simplified gives 107/135
- So, 21/30 + 5/54 = 107/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+5/54 21/30+10/54 21/60+5/54 63/30+5/54 21/30+15/54 21/90+5/54 21/30+25/54 21/30+35/54