Subtract 21/70 from 50/45
1st number: 1 5/45, 2nd number: 21/70
50/45 - 21/70 is 73/90.
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,
50/45 = 50 × 14/45 × 14 = 700/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
21/70 = 21 × 9/70 × 9 = 189/630 - Subtract the two like fractions:
700/630 - 189/630 = 700 - 189/630 = 511/630 - After reducing the fraction, the answer is 73/90
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