Add 70/5 and 54/21
1st number: 14 0/5, 2nd number: 2 12/21
70/5 + 54/21 is 116/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
70/5 = 70 × 21/5 × 21 = 1470/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
54/21 = 54 × 5/21 × 5 = 270/105 - Add the two like fractions:
1470/105 + 270/105 = 1470 + 270/105 = 1740/105 - 1740/105 simplified gives 116/7
- So, 70/5 + 54/21 = 116/7
In mixed form: 164/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/10+54/21 70/5+54/42 70/15+54/21 70/5+54/63 70/25+54/21 70/35+54/21