Add 4/90 and 70/25
1st number: 4/90, 2nd number: 2 20/25
4/90 + 70/25 is 128/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 25 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 90 × 5 = 450,
4/90 = 4 × 5/90 × 5 = 20/450 - Likewise, for the 2nd fraction, since 25 × 18 = 450,
70/25 = 70 × 18/25 × 18 = 1260/450 - Add the two like fractions:
20/450 + 1260/450 = 20 + 1260/450 = 1280/450 - 1280/450 simplified gives 128/45
- So, 4/90 + 70/25 = 128/45
In mixed form: 238/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90+70/25 4/90+70/50 12/90+70/25 4/90+70/75 20/90+70/25 28/90+70/25