Add 90/40 and 70/98
1st number: 2 10/40, 2nd number: 70/98
90/40 + 70/98 is 83/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 98 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 40 × 49 = 1960,
90/40 = 90 × 49/40 × 49 = 4410/1960 - Likewise, for the 2nd fraction, since 98 × 20 = 1960,
70/98 = 70 × 20/98 × 20 = 1400/1960 - Add the two like fractions:
4410/1960 + 1400/1960 = 4410 + 1400/1960 = 5810/1960 - 5810/1960 simplified gives 83/28
- So, 90/40 + 70/98 = 83/28
In mixed form: 227/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80+70/98