Add 42/40 and 75/70
1st number: 1 2/40, 2nd number: 1 5/70
42/40 + 75/70 is 297/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
42/40 = 42 × 7/40 × 7 = 294/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
75/70 = 75 × 4/70 × 4 = 300/280 - Add the two like fractions:
294/280 + 300/280 = 294 + 300/280 = 594/280 - 594/280 simplified gives 297/140
- So, 42/40 + 75/70 = 297/140
In mixed form: 217/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40+75/70 42/80+75/70