Add 90/45 and 72/18
1st number: 2 0/45, 2nd number: 4 0/18
90/45 + 72/18 is 6/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
90/45 = 90 × 2/45 × 2 = 180/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
72/18 = 72 × 5/18 × 5 = 360/90 - Add the two like fractions:
180/90 + 360/90 = 180 + 360/90 = 540/90 - 540/90 simplified gives 6/1
- So, 90/45 + 72/18 = 6/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/45+72/36 90/45+72/54 90/45+72/90