Add 56/40 and 8/21
1st number: 1 16/40, 2nd number: 8/21
56/40 + 8/21 is 187/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 21 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
56/40 = 56 × 21/40 × 21 = 1176/840 - Likewise, for the 2nd fraction, since 21 × 40 = 840,
8/21 = 8 × 40/21 × 40 = 320/840 - Add the two like fractions:
1176/840 + 320/840 = 1176 + 320/840 = 1496/840 - 1496/840 simplified gives 187/105
- So, 56/40 + 8/21 = 187/105
In mixed form: 182/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40+16/21 56/80+8/21 56/40+8/42 56/40+24/21 56/40+8/63 56/40+40/21 56/40+56/21