Add 42/80 and 5/84
42/80 + 5/84 is 491/840.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 84 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
42/80 = 42 × 21/80 × 21 = 882/1680 - Likewise, for the 2nd fraction, since 84 × 20 = 1680,
5/84 = 5 × 20/84 × 20 = 100/1680 - Add the two like fractions:
882/1680 + 100/1680 = 882 + 100/1680 = 982/1680 - 982/1680 simplified gives 491/840
- So, 42/80 + 5/84 = 491/840
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/80+5/84 42/80+10/84 42/80+15/84 42/80+25/84 42/80+35/84