Add 40/42 and 1/40
40/42 + 1/40 is 821/840.
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,
40/42 = 40 × 20/42 × 20 = 800/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
1/40 = 1 × 21/40 × 21 = 21/840 - Add the two like fractions:
800/840 + 21/840 = 800 + 21/840 = 821/840 - So, 40/42 + 1/40 = 821/840
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42+1/40 40/42+2/40 40/84+1/40 40/42+1/80 40/42+3/40 40/42+5/40 40/42+7/40