Add 81/80 and 70/4
1st number: 1 1/80, 2nd number: 17 2/4
81/80 + 70/4 is 1481/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 4 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
81/80 = 81 × 1/80 × 1 = 81/80 - Likewise, for the 2nd fraction, since 4 × 20 = 80,
70/4 = 70 × 20/4 × 20 = 1400/80 - Add the two like fractions:
81/80 + 1400/80 = 81 + 1400/80 = 1481/80 - So, 81/80 + 70/4 = 1481/80
In mixed form: 1841/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/80+70/8 81/80+70/12 81/80+70/20 81/80+70/28