Add 90/20 and 9/40
1st number: 4 10/20, 2nd number: 9/40
90/20 + 9/40 is 189/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
90/20 = 90 × 2/20 × 2 = 180/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
9/40 = 9 × 1/40 × 1 = 9/40 - Add the two like fractions:
180/40 + 9/40 = 180 + 9/40 = 189/40 - So, 90/20 + 9/40 = 189/40
In mixed form: 429/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+18/40 90/40+9/40 90/20+9/80 90/20+27/40 90/60+9/40 90/20+45/40 90/20+63/40