Add 64/90 and 45/70
64/90 + 45/70 is 853/630.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
64/90 = 64 × 7/90 × 7 = 448/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
45/70 = 45 × 9/70 × 9 = 405/630 - Add the two like fractions:
448/630 + 405/630 = 448 + 405/630 = 853/630 - So, 64/90 + 45/70 = 853/630
In mixed form: 1223/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/90+90/70