Subtract 30/40 from 63/21
1st number: 3 0/21, 2nd number: 30/40
63/21 - 30/40 is 9/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
63/21 = 63 × 40/21 × 40 = 2520/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
30/40 = 30 × 21/40 × 21 = 630/840 - Subtract the two like fractions:
2520/840 - 630/840 = 2520 - 630/840 = 1890/840 - After reducing the fraction, the answer is 9/4
- In mixed form: 21/4
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