Add 70/20 and 42/7
1st number: 3 10/20, 2nd number: 6 0/7
70/20 + 42/7 is 19/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
70/20 = 70 × 7/20 × 7 = 490/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
42/7 = 42 × 20/7 × 20 = 840/140 - Add the two like fractions:
490/140 + 840/140 = 490 + 840/140 = 1330/140 - 1330/140 simplified gives 19/2
- So, 70/20 + 42/7 = 19/2
In mixed form: 91/2
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