Subtract 84/70 from 21/45
1st number: 21/45, 2nd number: 1 14/70
21/45 - 84/70 is -11/15.
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,
21/45 = 21 × 14/45 × 14 = 294/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
84/70 = 84 × 9/70 × 9 = 756/630 - Subtract the two like fractions:
294/630 - 756/630 = 294 - 756/630 = -462/630 - After reducing the fraction, the answer is -11/15
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