Add 90/42 and 81/25
1st number: 2 6/42, 2nd number: 3 6/25
90/42 + 81/25 is 942/175.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 25 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 42 × 25 = 1050,
90/42 = 90 × 25/42 × 25 = 2250/1050 - Likewise, for the 2nd fraction, since 25 × 42 = 1050,
81/25 = 81 × 42/25 × 42 = 3402/1050 - Add the two like fractions:
2250/1050 + 3402/1050 = 2250 + 3402/1050 = 5652/1050 - 5652/1050 simplified gives 942/175
- So, 90/42 + 81/25 = 942/175
In mixed form: 567/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/84+81/25 90/42+81/50 90/42+81/75