Add 21/7 and 72/32
1st number: 3 0/7, 2nd number: 2 8/32
21/7 + 72/32 is 21/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 32 is 224
Next, find the equivalent fraction of both fractional numbers with denominator 224 - For the 1st fraction, since 7 × 32 = 224,
21/7 = 21 × 32/7 × 32 = 672/224 - Likewise, for the 2nd fraction, since 32 × 7 = 224,
72/32 = 72 × 7/32 × 7 = 504/224 - Add the two like fractions:
672/224 + 504/224 = 672 + 504/224 = 1176/224 - 1176/224 simplified gives 21/4
- So, 21/7 + 72/32 = 21/4
In mixed form: 51/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7+72/32 21/14+72/32 21/7+72/64 63/7+72/32 21/7+72/96 21/35+72/32 21/49+72/32