Subtract 30/90 from 60/42
1st number: 1 18/42, 2nd number: 30/90
60/42 - 30/90 is 23/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
60/42 = 60 × 15/42 × 15 = 900/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
30/90 = 30 × 7/90 × 7 = 210/630 - Subtract the two like fractions:
900/630 - 210/630 = 900 - 210/630 = 690/630 - After reducing the fraction, the answer is 23/21
- In mixed form: 12/21
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