Subtract 30/56 from 7/30, Solve 7/30

Subtract 30/56 from 7/30

7/30 - 30/56 is -127/420.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 56 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 30 × 28 = 840,
7/30 = 7 × 28/30 × 28 = 196/840
Likewise, for the 2nd fraction, since 56 × 15 = 840,
30/56 = 30 × 15/56 × 15 = 450/840
Subtract the two like fractions:
196/840 - 450/840 = 196 - 450/840 = -254/840
After reducing the fraction, the answer is -127/420

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