Add 98/20 and 90/28
1st number: 4 18/20, 2nd number: 3 6/28
98/20 + 90/28 is 284/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
98/20 = 98 × 7/20 × 7 = 686/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
90/28 = 90 × 5/28 × 5 = 450/140 - Add the two like fractions:
686/140 + 450/140 = 686 + 450/140 = 1136/140 - 1136/140 simplified gives 284/35
- So, 98/20 + 90/28 = 284/35
In mixed form: 84/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/40+90/28 98/20+90/56 98/60+90/28 98/20+90/84