Add 42/80 and 8/20
42/80 + 8/20 is 37/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
42/80 = 42 × 1/80 × 1 = 42/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
8/20 = 8 × 4/20 × 4 = 32/80 - Add the two like fractions:
42/80 + 32/80 = 42 + 32/80 = 74/80 - 74/80 simplified gives 37/40
- So, 42/80 + 8/20 = 37/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/80+8/20 42/80+16/20 42/80+8/40 42/80+24/20 42/80+8/60 42/80+40/20 42/80+56/20