Add 7/42 and 24/40
7/42 + 24/40 is 23/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
7/42 = 7 × 20/42 × 20 = 140/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
24/40 = 24 × 21/40 × 21 = 504/840 - Add the two like fractions:
140/840 + 504/840 = 140 + 504/840 = 644/840 - 644/840 simplified gives 23/30
- So, 7/42 + 24/40 = 23/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/42+24/40 7/42+48/40 7/84+24/40 7/42+24/80 21/42+24/40 7/42+72/40 35/42+24/40 49/42+24/40