Add 4/10 and 42/90
4/10 + 42/90 is 13/15.
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,
4/10 = 4 × 9/10 × 9 = 36/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
42/90 = 42 × 1/90 × 1 = 42/90 - Add the two like fractions:
36/90 + 42/90 = 36 + 42/90 = 78/90 - 78/90 simplified gives 13/15
- So, 4/10 + 42/90 = 13/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/10+42/90 4/10+84/90 4/20+42/90 12/10+42/90 4/30+42/90 20/10+42/90 4/50+42/90 28/10+42/90 4/70+42/90