Subtract 7/45 from 80/21
1st number: 3 17/21, 2nd number: 7/45
80/21 - 7/45 is 1151/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
80/21 = 80 × 15/21 × 15 = 1200/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
7/45 = 7 × 7/45 × 7 = 49/315 - Subtract the two like fractions:
1200/315 - 49/315 = 1200 - 49/315 = 1151/315 - In mixed form: 3206/315
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