Add 42/63 and 15/90
42/63 + 15/90 is 5/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
42/63 = 42 × 10/63 × 10 = 420/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
15/90 = 15 × 7/90 × 7 = 105/630 - Add the two like fractions:
420/630 + 105/630 = 420 + 105/630 = 525/630 - 525/630 simplified gives 5/6
- So, 42/63 + 15/90 = 5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63+15/90 42/63+30/90 42/63+45/90 42/63+75/90