Add 40/90 and 20/63
40/90 + 20/63 is 16/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
40/90 = 40 × 7/90 × 7 = 280/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
20/63 = 20 × 10/63 × 10 = 200/630 - Add the two like fractions:
280/630 + 200/630 = 280 + 200/630 = 480/630 - 480/630 simplified gives 16/21
- So, 40/90 + 20/63 = 16/21
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