Add 42/4 and 70/80
1st number: 10 2/4, 2nd number: 70/80
42/4 + 70/80 is 91/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 4 × 20 = 80,
42/4 = 42 × 20/4 × 20 = 840/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
70/80 = 70 × 1/80 × 1 = 70/80 - Add the two like fractions:
840/80 + 70/80 = 840 + 70/80 = 910/80 - 910/80 simplified gives 91/8
- So, 42/4 + 70/80 = 91/8
In mixed form: 113/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4+70/80 42/8+70/80 42/12+70/80 42/20+70/80 42/28+70/80