Subtract 21/80 from 63/45
1st number: 1 18/45, 2nd number: 21/80
63/45 - 21/80 is 91/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 45 × 16 = 720,
63/45 = 63 × 16/45 × 16 = 1008/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
21/80 = 21 × 9/80 × 9 = 189/720 - Subtract the two like fractions:
1008/720 - 189/720 = 1008 - 189/720 = 819/720 - After reducing the fraction, the answer is 91/80
- In mixed form: 111/80
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