Add 40/70 and 5/42
40/70 + 5/42 is 29/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
40/70 = 40 × 3/70 × 3 = 120/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
5/42 = 5 × 5/42 × 5 = 25/210 - Add the two like fractions:
120/210 + 25/210 = 120 + 25/210 = 145/210 - 145/210 simplified gives 29/42
- So, 40/70 + 5/42 = 29/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/70+5/42 40/70+10/42 40/70+5/84 40/70+15/42 40/70+25/42 40/70+35/42