Add 42/40 and 90/80
1st number: 1 2/40, 2nd number: 1 10/80
42/40 + 90/80 is 87/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 40 × 2 = 80,
42/40 = 42 × 2/40 × 2 = 84/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
90/80 = 90 × 1/80 × 1 = 90/80 - Add the two like fractions:
84/80 + 90/80 = 84 + 90/80 = 174/80 - 174/80 simplified gives 87/40
- So, 42/40 + 90/80 = 87/40
In mixed form: 27/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40+90/80 42/80+90/80