Add 90/42 and 4/40
1st number: 2 6/42, 2nd number: 4/40
90/42 + 4/40 is 157/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
90/42 = 90 × 20/42 × 20 = 1800/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
4/40 = 4 × 21/40 × 21 = 84/840 - Add the two like fractions:
1800/840 + 84/840 = 1800 + 84/840 = 1884/840 - 1884/840 simplified gives 157/70
- So, 90/42 + 4/40 = 157/70
In mixed form: 217/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+8/40 90/84+4/40 90/42+4/80 90/42+12/40 90/42+20/40 90/42+28/40