Add 72/30 and 28/63
1st number: 2 12/30, 2nd number: 28/63
72/30 + 28/63 is 128/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 30 × 21 = 630,
72/30 = 72 × 21/30 × 21 = 1512/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
28/63 = 28 × 10/63 × 10 = 280/630 - Add the two like fractions:
1512/630 + 280/630 = 1512 + 280/630 = 1792/630 - 1792/630 simplified gives 128/45
- So, 72/30 + 28/63 = 128/45
In mixed form: 238/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/30+56/63 72/60+28/63 72/30+84/63 72/90+28/63