Subtract 15/70 from 21/9
1st number: 2 3/9, 2nd number: 15/70
21/9 - 15/70 is 89/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 9 × 70 = 630,
21/9 = 21 × 70/9 × 70 = 1470/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
15/70 = 15 × 9/70 × 9 = 135/630 - Subtract the two like fractions:
1470/630 - 135/630 = 1470 - 135/630 = 1335/630 - After reducing the fraction, the answer is 89/42
- In mixed form: 25/42
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