Answers

Multiply 21/40 with 45/70

This multiplication involving fractions can also be rephrased as "What is 21/40 of 45/70?"

21/40 × 45/70 is 27/80.

Steps for multiplying fractions

1. Simply multiply the numerators and denominators separately:
2. 21/40 × 45/70 = 21 × 45/40 × 70 = 945/2800
3. After reducing the fraction, the answer is 27/80

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁴²/₄₀×⁴⁵/₇₀ ²¹/₄₀×⁹⁰/₇₀ ²¹/₈₀×⁴⁵/₇₀ ⁶³/₄₀×⁴⁵/₇₀

Multiply Fractions Calculator