Add 42/35 and 45/72
1st number: 1 7/35, 2nd number: 45/72
42/35 + 45/72 is 73/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 72 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 35 × 72 = 2520,
42/35 = 42 × 72/35 × 72 = 3024/2520 - Likewise, for the 2nd fraction, since 72 × 35 = 2520,
45/72 = 45 × 35/72 × 35 = 1575/2520 - Add the two like fractions:
3024/2520 + 1575/2520 = 3024 + 1575/2520 = 4599/2520 - 4599/2520 simplified gives 73/40
- So, 42/35 + 45/72 = 73/40
In mixed form: 133/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/35+45/72 42/35+90/72 42/70+45/72