Add 63/42 and 70/80
1st number: 1 21/42, 2nd number: 70/80
63/42 + 70/80 is 19/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
63/42 = 63 × 40/42 × 40 = 2520/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
70/80 = 70 × 21/80 × 21 = 1470/1680 - Add the two like fractions:
2520/1680 + 1470/1680 = 2520 + 1470/1680 = 3990/1680 - 3990/1680 simplified gives 19/8
- So, 63/42 + 70/80 = 19/8
In mixed form: 23/8
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