Add 42/6 and 84/40
1st number: 7 0/6, 2nd number: 2 4/40
42/6 + 84/40 is 91/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 6 × 20 = 120,
42/6 = 42 × 20/6 × 20 = 840/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
84/40 = 84 × 3/40 × 3 = 252/120 - Add the two like fractions:
840/120 + 252/120 = 840 + 252/120 = 1092/120 - 1092/120 simplified gives 91/10
- So, 42/6 + 84/40 = 91/10
In mixed form: 91/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/6+84/40 42/12+84/40 42/6+84/80 42/18+84/40 42/30+84/40