Add 18/60 and 70/63
1st number: 18/60, 2nd number: 1 7/63
18/60 + 70/63 is 127/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 60 × 21 = 1260,
18/60 = 18 × 21/60 × 21 = 378/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
70/63 = 70 × 20/63 × 20 = 1400/1260 - Add the two like fractions:
378/1260 + 1400/1260 = 378 + 1400/1260 = 1778/1260 - 1778/1260 simplified gives 127/90
- So, 18/60 + 70/63 = 127/90
In mixed form: 137/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/60+70/63 54/60+70/63 90/60+70/63