Add 42/90 and 98/20
1st number: 42/90, 2nd number: 4 18/20
42/90 + 98/20 is 161/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
42/90 = 42 × 2/90 × 2 = 84/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
98/20 = 98 × 9/20 × 9 = 882/180 - Add the two like fractions:
84/180 + 882/180 = 84 + 882/180 = 966/180 - 966/180 simplified gives 161/30
- So, 42/90 + 98/20 = 161/30
In mixed form: 511/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90+98/20 42/90+98/40 42/90+98/60