Add 42/8 and 45/90
1st number: 5 2/8, 2nd number: 45/90
42/8 + 45/90 is 23/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
42/8 = 42 × 45/8 × 45 = 1890/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
45/90 = 45 × 4/90 × 4 = 180/360 - Add the two like fractions:
1890/360 + 180/360 = 1890 + 180/360 = 2070/360 - 2070/360 simplified gives 23/4
- So, 42/8 + 45/90 = 23/4
In mixed form: 53/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/8+45/90 42/16+45/90 42/24+45/90 42/40+45/90 42/56+45/90