Add 81/36 and 42/90
1st number: 2 9/36, 2nd number: 42/90
81/36 + 42/90 is 163/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
81/36 = 81 × 5/36 × 5 = 405/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
42/90 = 42 × 2/90 × 2 = 84/180 - Add the two like fractions:
405/180 + 84/180 = 405 + 84/180 = 489/180 - 489/180 simplified gives 163/60
- So, 81/36 + 42/90 = 163/60
In mixed form: 243/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/36+84/90 81/72+42/90