Subtract 3/90 from 42/75
42/75 - 3/90 is 79/150.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 75 × 6 = 450,
42/75 = 42 × 6/75 × 6 = 252/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
3/90 = 3 × 5/90 × 5 = 15/450 - Subtract the two like fractions:
252/450 - 15/450 = 252 - 15/450 = 237/450 - After reducing the fraction, the answer is 79/150
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