Add 40/8 and 21/45
1st number: 5 0/8, 2nd number: 21/45
40/8 + 21/45 is 82/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
40/8 = 40 × 45/8 × 45 = 1800/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
21/45 = 21 × 8/45 × 8 = 168/360 - Add the two like fractions:
1800/360 + 168/360 = 1800 + 168/360 = 1968/360 - 1968/360 simplified gives 82/15
- So, 40/8 + 21/45 = 82/15
In mixed form: 57/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/8+21/45 40/8+42/45 40/16+21/45 40/8+21/90 40/8+63/45 40/24+21/45 40/56+21/45