Add 63/45 and 90/12
1st number: 1 18/45, 2nd number: 7 6/12
63/45 + 90/12 is 89/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
63/45 = 63 × 4/45 × 4 = 252/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
90/12 = 90 × 15/12 × 15 = 1350/180 - Add the two like fractions:
252/180 + 1350/180 = 252 + 1350/180 = 1602/180 - 1602/180 simplified gives 89/10
- So, 63/45 + 90/12 = 89/10
In mixed form: 89/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/90+90/12 63/45+90/24 63/45+90/36 63/45+90/60 63/45+90/84