Subtract 7/70 from 28/30, Solve 28/30

Subtract 7/70 from 28/30

28/30 - 7/70 is 5/6.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 70 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
28/30 = 28 × 7/30 × 7 = 196/210
Likewise, for the 2nd fraction, since 70 × 3 = 210,
7/70 = 7 × 3/70 × 3 = 21/210
Subtract the two like fractions:
196/210 - 21/210 = 196 - 21/210 = 175/210
After reducing the fraction, the answer is 5/6

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