Add 20/54 and 40/63
20/54 + 40/63 is 190/189.
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,
40/63 = 40 × 6/63 × 6 = 240/378 - Add the two like fractions:
140/378 + 240/378 = 140 + 240/378 = 380/378 - 380/378 simplified gives 190/189
- So, 20/54 + 40/63 = 190/189
In mixed form: 11/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/54+40/63 20/54+80/63 60/54+40/63