Add 20/90 and 4/5
20/90 + 4/5 is 46/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 5 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
20/90 = 20 × 1/90 × 1 = 20/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
4/5 = 4 × 18/5 × 18 = 72/90 - Add the two like fractions:
20/90 + 72/90 = 20 + 72/90 = 92/90 - 92/90 simplified gives 46/45
- So, 20/90 + 4/5 = 46/45
In mixed form: 11/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90+4/5 20/90+8/5 20/90+4/10 60/90+4/5 20/90+12/5 20/90+4/15 20/90+20/5 20/90+4/25 20/90+28/5 20/90+4/35