Add 75/21 and 3/45
1st number: 3 12/21, 2nd number: 3/45
75/21 + 3/45 is 382/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
75/21 = 75 × 15/21 × 15 = 1125/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
3/45 = 3 × 7/45 × 7 = 21/315 - Add the two like fractions:
1125/315 + 21/315 = 1125 + 21/315 = 1146/315 - 1146/315 simplified gives 382/105
- So, 75/21 + 3/45 = 382/105
In mixed form: 367/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/21+6/45 75/42+3/45 75/21+3/90 75/21+9/45 75/63+3/45 75/21+15/45 75/21+21/45