Add 3/42 and 90/45
1st number: 3/42, 2nd number: 2 0/45
3/42 + 90/45 is 29/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
3/42 = 3 × 15/42 × 15 = 45/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
90/45 = 90 × 14/45 × 14 = 1260/630 - Add the two like fractions:
45/630 + 1260/630 = 45 + 1260/630 = 1305/630 - 1305/630 simplified gives 29/14
- So, 3/42 + 90/45 = 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: 6/42+90/45 3/84+90/45 9/42+90/45 15/42+90/45 21/42+90/45