Add 72/21 and 84/60
1st number: 3 9/21, 2nd number: 1 24/60
72/21 + 84/60 is 169/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
72/21 = 72 × 20/21 × 20 = 1440/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
84/60 = 84 × 7/60 × 7 = 588/420 - Add the two like fractions:
1440/420 + 588/420 = 1440 + 588/420 = 2028/420 - 2028/420 simplified gives 169/35
- So, 72/21 + 84/60 = 169/35
In mixed form: 429/35
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