Subtract 40/70 from 21/9
1st number: 2 3/9, 2nd number: 40/70
21/9 - 40/70 is 37/21.
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,
40/70 = 40 × 9/70 × 9 = 360/630 - Subtract the two like fractions:
1470/630 - 360/630 = 1470 - 360/630 = 1110/630 - After reducing the fraction, the answer is 37/21
- In mixed form: 116/21
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