Add 70/84 and 81/20
1st number: 70/84, 2nd number: 4 1/20
70/84 + 81/20 is 293/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
70/84 = 70 × 5/84 × 5 = 350/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
81/20 = 81 × 21/20 × 21 = 1701/420 - Add the two like fractions:
350/420 + 1701/420 = 350 + 1701/420 = 2051/420 - 2051/420 simplified gives 293/60
- So, 70/84 + 81/20 = 293/60
In mixed form: 453/60
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