Add 21/5 and 70/54
1st number: 4 1/5, 2nd number: 1 16/54
21/5 + 70/54 is 742/135.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 5 × 54 = 270,
21/5 = 21 × 54/5 × 54 = 1134/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
70/54 = 70 × 5/54 × 5 = 350/270 - Add the two like fractions:
1134/270 + 350/270 = 1134 + 350/270 = 1484/270 - 1484/270 simplified gives 742/135
- So, 21/5 + 70/54 = 742/135
In mixed form: 567/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5+70/54 21/10+70/54 63/5+70/54 21/15+70/54 21/25+70/54 21/35+70/54