Subtract 1/90 from 42/84
42/84 - 1/90 is 22/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
42/84 = 42 × 15/84 × 15 = 630/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
1/90 = 1 × 14/90 × 14 = 14/1260 - Subtract the two like fractions:
630/1260 - 14/1260 = 630 - 14/1260 = 616/1260 - After reducing the fraction, the answer is 22/45
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