Add 42/5 and 15/90
1st number: 8 2/5, 2nd number: 15/90
42/5 + 15/90 is 257/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
42/5 = 42 × 18/5 × 18 = 756/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
15/90 = 15 × 1/90 × 1 = 15/90 - Add the two like fractions:
756/90 + 15/90 = 756 + 15/90 = 771/90 - 771/90 simplified gives 257/30
- So, 42/5 + 15/90 = 257/30
In mixed form: 817/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/5+15/90 42/5+30/90 42/10+15/90 42/5+45/90 42/15+15/90 42/5+75/90 42/25+15/90 42/35+15/90