Add 90/20 and 1/45
1st number: 4 10/20, 2nd number: 1/45
90/20 + 1/45 is 407/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
90/20 = 90 × 9/20 × 9 = 810/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
1/45 = 1 × 4/45 × 4 = 4/180 - Add the two like fractions:
810/180 + 4/180 = 810 + 4/180 = 814/180 - 814/180 simplified gives 407/90
- So, 90/20 + 1/45 = 407/90
In mixed form: 447/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+2/45 90/40+1/45 90/20+1/90 90/20+3/45 90/60+1/45 90/20+5/45 90/20+7/45