Add 70/45 and 75/81
1st number: 1 25/45, 2nd number: 75/81
70/45 + 75/81 is 67/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 45 × 9 = 405,
70/45 = 70 × 9/45 × 9 = 630/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
75/81 = 75 × 5/81 × 5 = 375/405 - Add the two like fractions:
630/405 + 375/405 = 630 + 375/405 = 1005/405 - 1005/405 simplified gives 67/27
- So, 70/45 + 75/81 = 67/27
In mixed form: 213/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/90+75/81