Subtract 21/70 from 75/45
1st number: 1 30/45, 2nd number: 21/70
75/45 - 21/70 is 41/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
75/45 = 75 × 14/45 × 14 = 1050/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
21/70 = 21 × 9/70 × 9 = 189/630 - Subtract the two like fractions:
1050/630 - 189/630 = 1050 - 189/630 = 861/630 - After reducing the fraction, the answer is 41/30
- In mixed form: 111/30
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