Add 81/60 and 45/15
1st number: 1 21/60, 2nd number: 3 0/15
81/60 + 45/15 is 87/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 60 × 1 = 60,
81/60 = 81 × 1/60 × 1 = 81/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
45/15 = 45 × 4/15 × 4 = 180/60 - Add the two like fractions:
81/60 + 180/60 = 81 + 180/60 = 261/60 - 261/60 simplified gives 87/20
- So, 81/60 + 45/15 = 87/20
In mixed form: 47/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/60+90/15 81/60+45/30 81/60+45/75