Add 21/90 and 70/50
1st number: 21/90, 2nd number: 1 20/50
21/90 + 70/50 is 49/30.
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,
21/90 = 21 × 5/90 × 5 = 105/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
70/50 = 70 × 9/50 × 9 = 630/450 - Add the two like fractions:
105/450 + 630/450 = 105 + 630/450 = 735/450 - 735/450 simplified gives 49/30
- So, 21/90 + 70/50 = 49/30
In mixed form: 119/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90+70/50 63/90+70/50