Add 72/21 and 90/32
1st number: 3 9/21, 2nd number: 2 26/32
72/21 + 90/32 is 699/112.
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,
72/21 = 72 × 32/21 × 32 = 2304/672 - Likewise, for the 2nd fraction, since 32 × 21 = 672,
90/32 = 90 × 21/32 × 21 = 1890/672 - Add the two like fractions:
2304/672 + 1890/672 = 2304 + 1890/672 = 4194/672 - 4194/672 simplified gives 699/112
- So, 72/21 + 90/32 = 699/112
In mixed form: 627/112
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