Add 20/54 and 72/63
1st number: 20/54, 2nd number: 1 9/63
20/54 + 72/63 is 286/189.
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,
20/54 = 20 × 7/54 × 7 = 140/378 - Likewise, for the 2nd fraction, since 63 × 6 = 378,
72/63 = 72 × 6/63 × 6 = 432/378 - Add the two like fractions:
140/378 + 432/378 = 140 + 432/378 = 572/378 - 572/378 simplified gives 286/189
- So, 20/54 + 72/63 = 286/189
In mixed form: 197/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/54+72/63 60/54+72/63