Add 75/20 and 42/90
1st number: 3 15/20, 2nd number: 42/90
75/20 + 42/90 is 253/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
75/20 = 75 × 9/20 × 9 = 675/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
42/90 = 42 × 2/90 × 2 = 84/180 - Add the two like fractions:
675/180 + 84/180 = 675 + 84/180 = 759/180 - 759/180 simplified gives 253/60
- So, 75/20 + 42/90 = 253/60
In mixed form: 413/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/20+84/90 75/40+42/90 75/60+42/90