Subtract 3/10 from 72/42
1st number: 1 30/42, 2nd number: 3/10
72/42 - 3/10 is 99/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
72/42 = 72 × 5/42 × 5 = 360/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
3/10 = 3 × 21/10 × 21 = 63/210 - Subtract the two like fractions:
360/210 - 63/210 = 360 - 63/210 = 297/210 - After reducing the fraction, the answer is 99/70
- In mixed form: 129/70
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