Add 72/45 and 45/70
1st number: 1 27/45, 2nd number: 45/70
72/45 + 45/70 is 157/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
72/45 = 72 × 14/45 × 14 = 1008/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
45/70 = 45 × 9/70 × 9 = 405/630 - Add the two like fractions:
1008/630 + 405/630 = 1008 + 405/630 = 1413/630 - 1413/630 simplified gives 157/70
- So, 72/45 + 45/70 = 157/70
In mixed form: 217/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/45+90/70 72/90+45/70