Add 20/90 and 30/64
20/90 + 30/64 is 199/288.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 64 is 2880
Next, find the equivalent fraction of both fractional numbers with denominator 2880 - For the 1st fraction, since 90 × 32 = 2880,
20/90 = 20 × 32/90 × 32 = 640/2880 - Likewise, for the 2nd fraction, since 64 × 45 = 2880,
30/64 = 30 × 45/64 × 45 = 1350/2880 - Add the two like fractions:
640/2880 + 1350/2880 = 640 + 1350/2880 = 1990/2880 - 1990/2880 simplified gives 199/288
- So, 20/90 + 30/64 = 199/288
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90+30/64 20/90+60/64 60/90+30/64 20/90+90/64