Add 18/45 and 90/48
1st number: 18/45, 2nd number: 1 42/48
18/45 + 90/48 is 91/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 48 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 45 × 16 = 720,
18/45 = 18 × 16/45 × 16 = 288/720 - Likewise, for the 2nd fraction, since 48 × 15 = 720,
90/48 = 90 × 15/48 × 15 = 1350/720 - Add the two like fractions:
288/720 + 1350/720 = 288 + 1350/720 = 1638/720 - 1638/720 simplified gives 91/40
- So, 18/45 + 90/48 = 91/40
In mixed form: 211/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/45+90/48 18/90+90/48 18/45+90/96 54/45+90/48 90/45+90/48