Add 42/10 and 45/90
1st number: 4 2/10, 2nd number: 45/90
42/10 + 45/90 is 47/10.
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,
45/90 = 45 × 1/90 × 1 = 45/90 - Add the two like fractions:
378/90 + 45/90 = 378 + 45/90 = 423/90 - 423/90 simplified gives 47/10
- So, 42/10 + 45/90 = 47/10
In mixed form: 47/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10+45/90 42/20+45/90 42/30+45/90 42/50+45/90 42/70+45/90