Add 84/21 and 18/72
1st number: 4 0/21, 2nd number: 18/72
84/21 + 18/72 is 17/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
84/21 = 84 × 24/21 × 24 = 2016/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
18/72 = 18 × 7/72 × 7 = 126/504 - Add the two like fractions:
2016/504 + 126/504 = 2016 + 126/504 = 2142/504 - 2142/504 simplified gives 17/4
- So, 84/21 + 18/72 = 17/4
In mixed form: 41/4
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