Subtract 27/40 from 30/60, Solve 30/60

Subtract 27/40 from 30/60

30/60 - 27/40 is -7/40.

Find the least common denominator or LCM of the two denominators:
LCM of 60 and 40 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 60 × 2 = 120,
30/60 = 30 × 2/60 × 2 = 60/120
Likewise, for the 2nd fraction, since 40 × 3 = 120,
27/40 = 27 × 3/40 × 3 = 81/120
Subtract the two like fractions:
60/120 - 81/120 = 60 - 81/120 = -21/120
After reducing the fraction, the answer is -7/40

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