Add 21/63 and 25/30
21/63 + 25/30 is 7/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 30 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
21/63 = 21 × 10/63 × 10 = 210/630 - Likewise, for the 2nd fraction, since 30 × 21 = 630,
25/30 = 25 × 21/30 × 21 = 525/630 - Add the two like fractions:
210/630 + 525/630 = 210 + 525/630 = 735/630 - 735/630 simplified gives 7/6
- So, 21/63 + 25/30 = 7/6
In mixed form: 11/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63+25/30 21/63+50/30 21/63+25/60 21/63+75/30 21/63+25/90