Add 70/90 and 15/42
70/90 + 15/42 is 143/126.
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,
70/90 = 70 × 7/90 × 7 = 490/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
15/42 = 15 × 15/42 × 15 = 225/630 - Add the two like fractions:
490/630 + 225/630 = 490 + 225/630 = 715/630 - 715/630 simplified gives 143/126
- So, 70/90 + 15/42 = 143/126
In mixed form: 117/126
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