Add 42/10 and 20/90
1st number: 4 2/10, 2nd number: 20/90
42/10 + 20/90 is 199/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
42/10 = 42 × 9/10 × 9 = 378/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
20/90 = 20 × 1/90 × 1 = 20/90 - Add the two like fractions:
378/90 + 20/90 = 378 + 20/90 = 398/90 - 398/90 simplified gives 199/45
- So, 42/10 + 20/90 = 199/45
In mixed form: 419/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10+20/90 42/10+40/90 42/20+20/90 42/10+60/90 42/30+20/90 42/50+20/90 42/70+20/90