Subtract 98/45 from 42/21
1st number: 2 0/21, 2nd number: 2 8/45
42/21 - 98/45 is -8/45.
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,
42/21 = 42 × 15/21 × 15 = 630/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
98/45 = 98 × 7/45 × 7 = 686/315 - Subtract the two like fractions:
630/315 - 686/315 = 630 - 686/315 = -56/315 - After reducing the fraction, the answer is -8/45
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