Add 45/90 and 70/7
1st number: 45/90, 2nd number: 10 0/7
45/90 + 70/7 is 21/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
45/90 = 45 × 7/90 × 7 = 315/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
70/7 = 70 × 90/7 × 90 = 6300/630 - Add the two like fractions:
315/630 + 6300/630 = 315 + 6300/630 = 6615/630 - 6615/630 simplified gives 21/2
- So, 45/90 + 70/7 = 21/2
In mixed form: 101/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 45/90+70/14 45/90+70/21 45/90+70/35 45/90+70/49