Add 42/48 and 21/40
42/48 + 21/40 is 7/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 40 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 48 × 5 = 240,
42/48 = 42 × 5/48 × 5 = 210/240 - Likewise, for the 2nd fraction, since 40 × 6 = 240,
21/40 = 21 × 6/40 × 6 = 126/240 - Add the two like fractions:
210/240 + 126/240 = 210 + 126/240 = 336/240 - 336/240 simplified gives 7/5
- So, 42/48 + 21/40 = 7/5
In mixed form: 12/5
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