Subtract 42/30 from 28/8
1st number: 3 4/8, 2nd number: 1 12/30
28/8 - 42/30 is 21/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
28/8 = 28 × 15/8 × 15 = 420/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
42/30 = 42 × 4/30 × 4 = 168/120 - Subtract the two like fractions:
420/120 - 168/120 = 420 - 168/120 = 252/120 - After reducing the fraction, the answer is 21/10
- In mixed form: 21/10
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