Add 72/42 and 98/20
1st number: 1 30/42, 2nd number: 4 18/20
72/42 + 98/20 is 463/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
72/42 = 72 × 10/42 × 10 = 720/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
98/20 = 98 × 21/20 × 21 = 2058/420 - Add the two like fractions:
720/420 + 2058/420 = 720 + 2058/420 = 2778/420 - 2778/420 simplified gives 463/70
- So, 72/42 + 98/20 = 463/70
In mixed form: 643/70
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