Subtract 7/80 from 42/30
1st number: 1 12/30, 2nd number: 7/80
42/30 - 7/80 is 21/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
42/30 = 42 × 8/30 × 8 = 336/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
7/80 = 7 × 3/80 × 3 = 21/240 - Subtract the two like fractions:
336/240 - 21/240 = 336 - 21/240 = 315/240 - After reducing the fraction, the answer is 21/16
- In mixed form: 15/16
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