Add 70/90 and 42/50
70/90 + 42/50 is 364/225.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 50 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 90 × 5 = 450,
70/90 = 70 × 5/90 × 5 = 350/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
42/50 = 42 × 9/50 × 9 = 378/450 - Add the two like fractions:
350/450 + 378/450 = 350 + 378/450 = 728/450 - 728/450 simplified gives 364/225
- So, 70/90 + 42/50 = 364/225
In mixed form: 1139/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/90+84/50