Add 90/70 and 45/54
1st number: 1 20/70, 2nd number: 45/54
90/70 + 45/54 is 89/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 54 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 70 × 27 = 1890,
90/70 = 90 × 27/70 × 27 = 2430/1890 - Likewise, for the 2nd fraction, since 54 × 35 = 1890,
45/54 = 45 × 35/54 × 35 = 1575/1890 - Add the two like fractions:
2430/1890 + 1575/1890 = 2430 + 1575/1890 = 4005/1890 - 4005/1890 simplified gives 89/42
- So, 90/70 + 45/54 = 89/42
In mixed form: 25/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70+90/54