Add 98/20 and 90/72
1st number: 4 18/20, 2nd number: 1 18/72
98/20 + 90/72 is 123/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
98/20 = 98 × 18/20 × 18 = 1764/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
90/72 = 90 × 5/72 × 5 = 450/360 - Add the two like fractions:
1764/360 + 450/360 = 1764 + 450/360 = 2214/360 - 2214/360 simplified gives 123/20
- So, 98/20 + 90/72 = 123/20
In mixed form: 63/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/40+90/72 98/60+90/72