Subtract 4/40 from 45/84, Solve 45/84

Subtract 4/40 from 45/84

45/84 - 4/40 is 61/140.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 84 × 10 = 840,
45/84 = 45 × 10/84 × 10 = 450/840
Likewise, for the 2nd fraction, since 40 × 21 = 840,
4/40 = 4 × 21/40 × 21 = 84/840
Subtract the two like fractions:
450/840 - 84/840 = 450 - 84/840 = 366/840
After reducing the fraction, the answer is 61/140

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