Subtract 42/90 from 54/21
1st number: 2 12/21, 2nd number: 42/90
54/21 - 42/90 is 221/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
54/21 = 54 × 30/21 × 30 = 1620/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
42/90 = 42 × 7/90 × 7 = 294/630 - Subtract the two like fractions:
1620/630 - 294/630 = 1620 - 294/630 = 1326/630 - After reducing the fraction, the answer is 221/105
- In mixed form: 211/105
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