Add 8/42 and 42/80
8/42 + 42/80 is 601/840.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
8/42 = 8 × 40/42 × 40 = 320/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
42/80 = 42 × 21/80 × 21 = 882/1680 - Add the two like fractions:
320/1680 + 882/1680 = 320 + 882/1680 = 1202/1680 - 1202/1680 simplified gives 601/840
- So, 8/42 + 42/80 = 601/840
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42+42/80 8/42+84/80 8/84+42/80 24/42+42/80 40/42+42/80 56/42+42/80