Add 90/20 and 40/7
1st number: 4 10/20, 2nd number: 5 5/7
90/20 + 40/7 is 143/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
90/20 = 90 × 7/20 × 7 = 630/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
40/7 = 40 × 20/7 × 20 = 800/140 - Add the two like fractions:
630/140 + 800/140 = 630 + 800/140 = 1430/140 - 1430/140 simplified gives 143/14
- So, 90/20 + 40/7 = 143/14
In mixed form: 103/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+80/7 90/40+40/7 90/20+40/14 90/60+40/7 90/20+40/21 90/20+40/35 90/20+40/49