Add 30/54 and 25/63
30/54 + 25/63 is 20/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 63 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
30/54 = 30 × 7/54 × 7 = 210/378 - Likewise, for the 2nd fraction, since 63 × 6 = 378,
25/63 = 25 × 6/63 × 6 = 150/378 - Add the two like fractions:
210/378 + 150/378 = 210 + 150/378 = 360/378 - 360/378 simplified gives 20/21
- So, 30/54 + 25/63 = 20/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/54+25/63 30/54+50/63 90/54+25/63 30/54+75/63