Add 45/21 and 70/32
1st number: 2 3/21, 2nd number: 2 6/32
45/21 + 70/32 is 485/112.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 32 is 672
Next, find the equivalent fraction of both fractional numbers with denominator 672 - For the 1st fraction, since 21 × 32 = 672,
45/21 = 45 × 32/21 × 32 = 1440/672 - Likewise, for the 2nd fraction, since 32 × 21 = 672,
70/32 = 70 × 21/32 × 21 = 1470/672 - Add the two like fractions:
1440/672 + 1470/672 = 1440 + 1470/672 = 2910/672 - 2910/672 simplified gives 485/112
- So, 45/21 + 70/32 = 485/112
In mixed form: 437/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21+70/32 45/42+70/32 45/21+70/64 45/63+70/32 45/21+70/96