Add 40/70 and 20/63
40/70 + 20/63 is 8/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
40/70 = 40 × 9/70 × 9 = 360/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
20/63 = 20 × 10/63 × 10 = 200/630 - Add the two like fractions:
360/630 + 200/630 = 360 + 200/630 = 560/630 - 560/630 simplified gives 8/9
- So, 40/70 + 20/63 = 8/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/70+20/63 40/70+40/63 40/70+60/63