Add 45/70 and 90/63
1st number: 45/70, 2nd number: 1 27/63
45/70 + 90/63 is 29/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
45/70 = 45 × 9/70 × 9 = 405/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
90/63 = 90 × 10/63 × 10 = 900/630 - Add the two like fractions:
405/630 + 900/630 = 405 + 900/630 = 1305/630 - 1305/630 simplified gives 29/14
- So, 45/70 + 90/63 = 29/14
In mixed form: 21/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70+90/63