Add 42/80 and 16/70
42/80 + 16/70 is 211/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 70 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
42/80 = 42 × 7/80 × 7 = 294/560 - Likewise, for the 2nd fraction, since 70 × 8 = 560,
16/70 = 16 × 8/70 × 8 = 128/560 - Add the two like fractions:
294/560 + 128/560 = 294 + 128/560 = 422/560 - 422/560 simplified gives 211/280
- So, 42/80 + 16/70 = 211/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/80+16/70 42/80+32/70 42/80+48/70 42/80+80/70