Subtract 7/40 from 4/21
421 - 740 is 13840.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
421 = 4 × 4021 × 40 = 160840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
740 = 7 × 2140 × 21 = 147840 - Subtract the two like fractions:
160840 - 147840 = 160 - 147840 = 13840
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