Add 30/90 and 70/42
1st number: 30/90, 2nd number: 1 28/42
30/90 + 70/42 is 2/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
30/90 = 30 × 7/90 × 7 = 210/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
70/42 = 70 × 15/42 × 15 = 1050/630 - Add the two like fractions:
210/630 + 1050/630 = 210 + 1050/630 = 1260/630 - 1260/630 simplified gives 2/1
- So, 30/90 + 70/42 = 2/1
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