Add 15/90 and 4/70
15/90 + 4/70 is 47/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
15/90 = 15 × 7/90 × 7 = 105/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
4/70 = 4 × 9/70 × 9 = 36/630 - Add the two like fractions:
105/630 + 36/630 = 105 + 36/630 = 141/630 - 141/630 simplified gives 47/210
- So, 15/90 + 4/70 = 47/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90+4/70 15/90+8/70 45/90+4/70 15/90+12/70 75/90+4/70 15/90+20/70 15/90+28/70