Add 9/40 and 84/70
1st number: 9/40, 2nd number: 1 14/70
9/40 + 84/70 is 57/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
9/40 = 9 × 7/40 × 7 = 63/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
84/70 = 84 × 4/70 × 4 = 336/280 - Add the two like fractions:
63/280 + 336/280 = 63 + 336/280 = 399/280 - 399/280 simplified gives 57/40
- So, 9/40 + 84/70 = 57/40
In mixed form: 117/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40+84/70 9/80+84/70 27/40+84/70 45/40+84/70 63/40+84/70