Subtract 3/42 from 72/30
1st number: 2 12/30, 2nd number: 3/42
72/30 - 3/42 is 163/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
72/30 = 72 × 7/30 × 7 = 504/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
3/42 = 3 × 5/42 × 5 = 15/210 - Subtract the two like fractions:
504/210 - 15/210 = 504 - 15/210 = 489/210 - After reducing the fraction, the answer is 163/70
- In mixed form: 223/70
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