Add 81/60 and 5/8
1st number: 1 21/60, 2nd number: 5/8
81/60 + 5/8 is 79/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 60 × 2 = 120,
81/60 = 81 × 2/60 × 2 = 162/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
5/8 = 5 × 15/8 × 15 = 75/120 - Add the two like fractions:
162/120 + 75/120 = 162 + 75/120 = 237/120 - 237/120 simplified gives 79/40
- So, 81/60 + 5/8 = 79/40
In mixed form: 139/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/60+10/8 81/60+5/16 81/60+15/8 81/60+5/24 81/60+25/8 81/60+5/40 81/60+35/8 81/60+5/56