Subtract 7/70 from 30/48, Solve 30/48

Subtract 7/70 from 30/48

30/48 - 7/70 is 21/40.

Find the least common denominator or LCM of the two denominators:
LCM of 48 and 70 is 1680

Next, find the equivalent fraction of both fractional numbers with denominator 1680
For the 1st fraction, since 48 × 35 = 1680,
30/48 = 30 × 35/48 × 35 = 1050/1680
Likewise, for the 2nd fraction, since 70 × 24 = 1680,
7/70 = 7 × 24/70 × 24 = 168/1680
Subtract the two like fractions:
1050/1680 - 168/1680 = 1050 - 168/1680 = 882/1680
After reducing the fraction, the answer is 21/40

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