12 books
Step-by-step
21/1.75= 12 books
133/201
Step-by-step explanation:
Find the Greatest Common Factor (GCF) of 399 and 603, if it exists, and reduce our fraction by dividing both numerator and denominator by it. GCF = 3, and getting our simplified
399/603 ÷ 3 =
133/201