Add 75/45 and 15/70
1st number: 1 30/45, 2nd number: 15/70
75/45 + 15/70 is 79/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
75/45 = 75 × 14/45 × 14 = 1050/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
15/70 = 15 × 9/70 × 9 = 135/630 - Add the two like fractions:
1050/630 + 135/630 = 1050 + 135/630 = 1185/630 - 1185/630 simplified gives 79/42
- So, 75/45 + 15/70 = 79/42
In mixed form: 137/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/45+30/70 75/90+15/70 75/45+45/70 75/45+75/70