Add 21/16 and 15/45
1st number: 1 5/16, 2nd number: 15/45
21/16 + 15/45 is 79/48.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 16 × 45 = 720,
21/16 = 21 × 45/16 × 45 = 945/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
15/45 = 15 × 16/45 × 16 = 240/720 - Add the two like fractions:
945/720 + 240/720 = 945 + 240/720 = 1185/720 - 1185/720 simplified gives 79/48
- So, 21/16 + 15/45 = 79/48
In mixed form: 131/48
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/16+15/45 21/16+30/45 21/32+15/45 21/16+15/90 63/16+15/45 21/48+15/45 21/16+75/45 21/80+15/45