Add 70/90 and 32/21
1st number: 70/90, 2nd number: 1 11/21
70/90 + 32/21 is 145/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 21 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 21 × 30 = 630,
32/21 = 32 × 30/21 × 30 = 960/630 - Add the two like fractions:
490/630 + 960/630 = 490 + 960/630 = 1450/630 - 1450/630 simplified gives 145/63
- So, 70/90 + 32/21 = 145/63
In mixed form: 219/63
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