Add 75/90 and 20/63
75/90 + 20/63 is 145/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
75/90 = 75 × 7/90 × 7 = 525/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
20/63 = 20 × 10/63 × 10 = 200/630 - Add the two like fractions:
525/630 + 200/630 = 525 + 200/630 = 725/630 - 725/630 simplified gives 145/126
- So, 75/90 + 20/63 = 145/126
In mixed form: 119/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/90+40/63 75/90+60/63