Add 54/56 and 70/90
54/56 + 70/90 is 439/252.
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,
70/90 = 70 × 28/90 × 28 = 1960/2520 - Add the two like fractions:
2430/2520 + 1960/2520 = 2430 + 1960/2520 = 4390/2520 - 4390/2520 simplified gives 439/252
- So, 54/56 + 70/90 = 439/252
In mixed form: 1187/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: