Add 90/64 and 20/90
1st number: 1 26/64, 2nd number: 20/90
90/64 + 20/90 is 469/288.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 64 and 90 is 2880
Next, find the equivalent fraction of both fractional numbers with denominator 2880 - For the 1st fraction, since 64 × 45 = 2880,
90/64 = 90 × 45/64 × 45 = 4050/2880 - Likewise, for the 2nd fraction, since 90 × 32 = 2880,
20/90 = 20 × 32/90 × 32 = 640/2880 - Add the two like fractions:
4050/2880 + 640/2880 = 4050 + 640/2880 = 4690/2880 - 4690/2880 simplified gives 469/288
- So, 90/64 + 20/90 = 469/288
In mixed form: 1181/288
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/64+40/90 90/64+60/90