Add 84/7 and 9/40
1st number: 12 0/7, 2nd number: 9/40
84/7 + 9/40 is 489/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
84/7 = 84 × 40/7 × 40 = 3360/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
9/40 = 9 × 7/40 × 7 = 63/280 - Add the two like fractions:
3360/280 + 63/280 = 3360 + 63/280 = 3423/280 - 3423/280 simplified gives 489/40
- So, 84/7 + 9/40 = 489/40
In mixed form: 129/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/7+18/40 84/14+9/40 84/7+9/80 84/7+27/40 84/21+9/40 84/7+45/40 84/35+9/40 84/7+63/40 84/49+9/40