Add 32/8 and 90/21
1st number: 4 0/8, 2nd number: 4 6/21
32/8 + 90/21 is 58/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
32/8 = 32 × 21/8 × 21 = 672/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
90/21 = 90 × 8/21 × 8 = 720/168 - Add the two like fractions:
672/168 + 720/168 = 672 + 720/168 = 1392/168 - 1392/168 simplified gives 58/7
- So, 32/8 + 90/21 = 58/7
In mixed form: 82/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/8+90/21 32/16+90/21 32/8+90/42 96/8+90/21 32/24+90/21 32/8+90/63 32/40+90/21 32/56+90/21