Subtract 84/10 from 42/80
1st number: 42/80, 2nd number: 8 4/10
42/80 - 84/10 is -63/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 10 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
42/80 = 42 × 1/80 × 1 = 42/80 - Likewise, for the 2nd fraction, since 10 × 8 = 80,
84/10 = 84 × 8/10 × 8 = 672/80 - Subtract the two like fractions:
42/80 - 672/80 = 42 - 672/80 = -630/80 - After reducing the fraction, the answer is -63/8
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