Subtract 72/42 from 20/5
1st number: 4 0/5, 2nd number: 1 30/42
20/5 - 72/42 is 16/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 5 × 42 = 210,
20/5 = 20 × 42/5 × 42 = 840/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
72/42 = 72 × 5/42 × 5 = 360/210 - Subtract the two like fractions:
840/210 - 360/210 = 840 - 360/210 = 480/210 - After reducing the fraction, the answer is 16/7
- In mixed form: 22/7
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