Add 8/40 and 98/21
1st number: 8/40, 2nd number: 4 14/21
8/40 + 98/21 is 73/15.
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,
8/40 = 8 × 21/40 × 21 = 168/840 - Likewise, for the 2nd fraction, since 21 × 40 = 840,
98/21 = 98 × 40/21 × 40 = 3920/840 - Add the two like fractions:
168/840 + 3920/840 = 168 + 3920/840 = 4088/840 - 4088/840 simplified gives 73/15
- So, 8/40 + 98/21 = 73/15
In mixed form: 413/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/40+98/21 8/80+98/21 8/40+98/42 24/40+98/21 8/40+98/63 56/40+98/21