Add 54/56 and 20/90
54/56 + 20/90 is 299/252.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 90 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
54/56 = 54 × 45/56 × 45 = 2430/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
20/90 = 20 × 28/90 × 28 = 560/2520 - Add the two like fractions:
2430/2520 + 560/2520 = 2430 + 560/2520 = 2990/2520 - 2990/2520 simplified gives 299/252
- So, 54/56 + 20/90 = 299/252
In mixed form: 147/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/56+40/90 54/56+60/90