Add 75/84 and 81/40
1st number: 75/84, 2nd number: 2 1/40
75/84 + 81/40 is 817/280.
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,
75/84 = 75 × 10/84 × 10 = 750/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
81/40 = 81 × 21/40 × 21 = 1701/840 - Add the two like fractions:
750/840 + 1701/840 = 750 + 1701/840 = 2451/840 - 2451/840 simplified gives 817/280
- So, 75/84 + 81/40 = 817/280
In mixed form: 2257/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/84+81/80