Add 42/90 and 70/45
1st number: 42/90, 2nd number: 1 25/45
42/90 + 70/45 is 91/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
42/90 = 42 × 1/90 × 1 = 42/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
70/45 = 70 × 2/45 × 2 = 140/90 - Add the two like fractions:
42/90 + 140/90 = 42 + 140/90 = 182/90 - 182/90 simplified gives 91/45
- So, 42/90 + 70/45 = 91/45
In mixed form: 21/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90+70/45 42/90+70/90