Subtract 21/48 from 7/5, Solve 1 2/5

Subtract 21/48 from 7/5

1^st number: 1 2/5, 2^nd number: 21/48

7/5 - 21/48 is 77/80.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 48 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 5 × 48 = 240,
7/5 = 7 × 48/5 × 48 = 336/240
Likewise, for the 2nd fraction, since 48 × 5 = 240,
21/48 = 21 × 5/48 × 5 = 105/240
Subtract the two like fractions:
336/240 - 105/240 = 336 - 105/240 = 231/240
After reducing the fraction, the answer is 77/80

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