Add 20/40 and 90/56
1st number: 20/40, 2nd number: 1 34/56
20/40 + 90/56 is 59/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
20/40 = 20 × 7/40 × 7 = 140/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
90/56 = 90 × 5/56 × 5 = 450/280 - Add the two like fractions:
140/280 + 450/280 = 140 + 450/280 = 590/280 - 590/280 simplified gives 59/28
- So, 20/40 + 90/56 = 59/28
In mixed form: 23/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/80+90/56 60/40+90/56