Add 70/20 and 45/42
1st number: 3 10/20, 2nd number: 1 3/42
70/20 + 45/42 is 32/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
70/20 = 70 × 21/20 × 21 = 1470/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
45/42 = 45 × 10/42 × 10 = 450/420 - Add the two like fractions:
1470/420 + 450/420 = 1470 + 450/420 = 1920/420 - 1920/420 simplified gives 32/7
- So, 70/20 + 45/42 = 32/7
In mixed form: 44/7
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