Add 20/45 and 84/64
1st number: 20/45, 2nd number: 1 20/64
20/45 + 84/64 is 253/144.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 64 is 2880
Next, find the equivalent fraction of both fractional numbers with denominator 2880 - For the 1st fraction, since 45 × 64 = 2880,
20/45 = 20 × 64/45 × 64 = 1280/2880 - Likewise, for the 2nd fraction, since 64 × 45 = 2880,
84/64 = 84 × 45/64 × 45 = 3780/2880 - Add the two like fractions:
1280/2880 + 3780/2880 = 1280 + 3780/2880 = 5060/2880 - 5060/2880 simplified gives 253/144
- So, 20/45 + 84/64 = 253/144
In mixed form: 1109/144
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/45+84/64 20/90+84/64 60/45+84/64