Add 45/42 and 5/90
1st number: 1 3/42, 2nd number: 5/90
45/42 + 5/90 is 71/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
45/42 = 45 × 15/42 × 15 = 675/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
5/90 = 5 × 7/90 × 7 = 35/630 - Add the two like fractions:
675/630 + 35/630 = 675 + 35/630 = 710/630 - 710/630 simplified gives 71/63
- So, 45/42 + 5/90 = 71/63
In mixed form: 18/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+5/90 45/42+10/90 45/84+5/90 45/42+15/90 45/42+25/90 45/42+35/90