Subtract 4/70 from 21/36
21/36 - 4/70 is 221/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 70 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 36 × 35 = 1260,
21/36 = 21 × 35/36 × 35 = 735/1260 - Likewise, for the 2nd fraction, since 70 × 18 = 1260,
4/70 = 4 × 18/70 × 18 = 72/1260 - Subtract the two like fractions:
735/1260 - 72/1260 = 735 - 72/1260 = 663/1260 - After reducing the fraction, the answer is 221/420
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