Add 42/5 and 40/90
1st number: 8 2/5, 2nd number: 40/90
42/5 + 40/90 is 398/45.
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,
40/90 = 40 × 1/90 × 1 = 40/90 - Add the two like fractions:
756/90 + 40/90 = 756 + 40/90 = 796/90 - 796/90 simplified gives 398/45
- So, 42/5 + 40/90 = 398/45
In mixed form: 838/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/5+40/90 42/5+80/90 42/10+40/90 42/15+40/90 42/25+40/90 42/35+40/90