Subtract 42/45 from 81/70
1st number: 1 11/70, 2nd number: 42/45
81/70 - 42/45 is 47/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
81/70 = 81 × 9/70 × 9 = 729/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
42/45 = 42 × 14/45 × 14 = 588/630 - Subtract the two like fractions:
729/630 - 588/630 = 729 - 588/630 = 141/630 - After reducing the fraction, the answer is 47/210
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