Add 45/60 and 21/56
45/60 + 21/56 is 9/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 60 × 14 = 840,
45/60 = 45 × 14/60 × 14 = 630/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
21/56 = 21 × 15/56 × 15 = 315/840 - Add the two like fractions:
630/840 + 315/840 = 630 + 315/840 = 945/840 - 945/840 simplified gives 9/8
- So, 45/60 + 21/56 = 9/8
In mixed form: 11/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/60+21/56 45/60+42/56 45/60+63/56