Add 6/45 and 70/21
1st number: 6/45, 2nd number: 3 7/21
6/45 + 70/21 is 52/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
6/45 = 6 × 7/45 × 7 = 42/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
70/21 = 70 × 15/21 × 15 = 1050/315 - Add the two like fractions:
42/315 + 1050/315 = 42 + 1050/315 = 1092/315 - 1092/315 simplified gives 52/15
- So, 6/45 + 70/21 = 52/15
In mixed form: 37/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/45+70/21 6/90+70/21 6/45+70/42 18/45+70/21 6/45+70/63 30/45+70/21 42/45+70/21