Add 3/90 and 40/20
1st number: 3/90, 2nd number: 2 0/20
3/90 + 40/20 is 61/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
3/90 = 3 × 2/90 × 2 = 6/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
40/20 = 40 × 9/20 × 9 = 360/180 - Add the two like fractions:
6/180 + 360/180 = 6 + 360/180 = 366/180 - 366/180 simplified gives 61/30
- So, 3/90 + 40/20 = 61/30
In mixed form: 21/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/90+40/20 3/90+80/20 9/90+40/20 3/90+40/60 15/90+40/20 21/90+40/20