Add 42/90 and 90/42
1st number: 42/90, 2nd number: 2 6/42
42/90 + 90/42 is 274/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
42/90 = 42 × 7/90 × 7 = 294/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
90/42 = 90 × 15/42 × 15 = 1350/630 - Add the two like fractions:
294/630 + 1350/630 = 294 + 1350/630 = 1644/630 - 1644/630 simplified gives 274/105
- So, 42/90 + 90/42 = 274/105
In mixed form: 264/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90+90/42 42/90+90/84