Add 90/20 and 8/7
1st number: 4 10/20, 2nd number: 1 1/7
90/20 + 8/7 is 79/14.
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,
8/7 = 8 × 20/7 × 20 = 160/140 - Add the two like fractions:
630/140 + 160/140 = 630 + 160/140 = 790/140 - 790/140 simplified gives 79/14
- So, 90/20 + 8/7 = 79/14
In mixed form: 59/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+16/7 90/40+8/7 90/20+8/14 90/20+24/7 90/60+8/7 90/20+8/21 90/20+40/7 90/20+8/35 90/20+56/7 90/20+8/49