Add 90/10 and 45/20
1st number: 9 0/10, 2nd number: 2 5/20
90/10 + 45/20 is 45/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
90/10 = 90 × 2/10 × 2 = 180/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
45/20 = 45 × 1/20 × 1 = 45/20 - Add the two like fractions:
180/20 + 45/20 = 180 + 45/20 = 225/20 - 225/20 simplified gives 45/4
- So, 90/10 + 45/20 = 45/4
In mixed form: 111/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/10+90/20 90/20+45/20 90/10+45/40 90/30+45/20 90/10+45/60 90/50+45/20 90/70+45/20