Add 75/21 and 9/90
1st number: 3 12/21, 2nd number: 9/90
75/21 + 9/90 is 257/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
75/21 = 75 × 30/21 × 30 = 2250/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
9/90 = 9 × 7/90 × 7 = 63/630 - Add the two like fractions:
2250/630 + 63/630 = 2250 + 63/630 = 2313/630 - 2313/630 simplified gives 257/70
- So, 75/21 + 9/90 = 257/70
In mixed form: 347/70
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