Add 81/84 and 6/40
81/84 + 6/40 is 39/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
81/84 = 81 × 10/84 × 10 = 810/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
6/40 = 6 × 21/40 × 21 = 126/840 - Add the two like fractions:
810/840 + 126/840 = 810 + 126/840 = 936/840 - 936/840 simplified gives 39/35
- So, 81/84 + 6/40 = 39/35
In mixed form: 14/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/84+12/40 81/84+6/80 81/84+18/40 81/84+30/40 81/84+42/40