Add 42/90 and 18/25
42/90 + 18/25 is 89/75.
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,
42/90 = 42 × 5/90 × 5 = 210/450 - Likewise, for the 2nd fraction, since 25 × 18 = 450,
18/25 = 18 × 18/25 × 18 = 324/450 - Add the two like fractions:
210/450 + 324/450 = 210 + 324/450 = 534/450 - 534/450 simplified gives 89/75
- So, 42/90 + 18/25 = 89/75
In mixed form: 114/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90+18/25 42/90+36/25 42/90+18/50 42/90+54/25 42/90+18/75 42/90+90/25