Add 16/21 and 70/80
16/21 + 70/80 is 275/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
16/21 = 16 × 80/21 × 80 = 1280/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
70/80 = 70 × 21/80 × 21 = 1470/1680 - Add the two like fractions:
1280/1680 + 1470/1680 = 1280 + 1470/1680 = 2750/1680 - 2750/1680 simplified gives 275/168
- So, 16/21 + 70/80 = 275/168
In mixed form: 1107/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/21+70/80 16/42+70/80 48/21+70/80 16/63+70/80 80/21+70/80